2666694480 has 80 divisors (see below), whose sum is σ = 8291534784. Its totient is φ = 708986880.

The previous prime is 2666694461. The next prime is 2666694491. The reversal of 2666694480 is 844966662.

2666694480 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×2666694480² = 14222518899324940800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64395 + ... + 97365.

Almost surely, 2^2666694480 is an apocalyptic number.

2666694480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2666694480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4145767392).

2666694480 is an abundant number, since it is smaller than the sum of its proper divisors (5624840304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666694480 is a wasteful number, since it uses less digits than its factorization.

2666694480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33324 (or 33318 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 51.

The square root of 2666694480 is about 51640.0472501720. The cubic root of 2666694480 is about 1386.7273698566.

The spelling of 2666694480 in words is "two billion, six hundred sixty-six million, six hundred ninety-four thousand, four hundred eighty".