2666257356 has 72 divisors (see below), whose sum is σ = 7552926976. Its totient is φ = 716970240.

The previous prime is 2666257343. The next prime is 2666257381. The reversal of 2666257356 is 6537526662.

It is a super-2 number, since 2×2666257356² = 14217856576848221472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30640 + ... + 79191.

Almost surely, 2^2666257356 is an apocalyptic number.

It is an amenable number.

2666257356 is an abundant number, since it is smaller than the sum of its proper divisors (4886669620).

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

2666257356 is a wasteful number, since it uses less digits than its factorization.

2666257356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109879 (or 109860 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 48.

The square root of 2666257356 is about 51635.8146638552. The cubic root of 2666257356 is about 1386.6515950295.

The spelling of 2666257356 in words is "two billion, six hundred sixty-six million, two hundred fifty-seven thousand, three hundred fifty-six".