2666763864 has 64 divisors (see below), whose sum is σ = 7425045600. Its totient is φ = 886837248.

The previous prime is 2666763859. The next prime is 2666763877. The reversal of 2666763864 is 4683676662.

It is a super-2 number, since 2×2666763864² = 14223259012672420992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 2666763864.

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, 79272 + ... + 107784.

Almost surely, 2^2666763864 is an apocalyptic number.

2666763864 is a gapful number since it is divisible by the number (24) 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 2666763864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3712522800).

2666763864 is an abundant number, since it is smaller than the sum of its proper divisors (4758281736).

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

2666763864 is a wasteful number, since it uses less digits than its factorization.

2666763864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28961 (or 28951 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 54.

The square root of 2666763864 is about 51640.7190499900. The cubic root of 2666763864 is about 1386.7393967133.

The spelling of 2666763864 in words is "two billion, six hundred sixty-six million, seven hundred sixty-three thousand, eight hundred sixty-four".