2666693280 has 48 divisors (see below), whose sum is σ = 8400085344. Its totient is φ = 711118080.

The previous prime is 2666693279. The next prime is 2666693291. The reversal of 2666693280 is 823966662.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×2666693280² = 14222506099194316800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2777326 + ... + 2778285.

It is an arithmetic number, because the mean of its divisors is an integer number (175001778).

Almost surely, 2^2666693280 is an apocalyptic number.

2666693280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2666693280 is an abundant number, since it is smaller than the sum of its proper divisors (5733392064).

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

2666693280 is a wasteful number, since it uses less digits than its factorization.

2666693280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555629 (or 5555621 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 48.

The square root of 2666693280 is about 51640.0356312813. The cubic root of 2666693280 is about 1386.7271618496.

The spelling of 2666693280 in words is "two billion, six hundred sixty-six million, six hundred ninety-three thousand, two hundred eighty".