266697434056 has 16 divisors (see below), whose sum is σ = 500064525900. Its totient is φ = 133346893824.

The previous prime is 266697434033. The next prime is 266697434071. The reversal of 266697434056 is 650434796662.

It can be written as a sum of positive squares in 2 ways, for example, as 259453721956 + 7243712100 = 509366^2 + 85110^2 .

It is a super-2 number, since 2×266697434056² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549960 + ... + 914248.

Almost surely, 2^266697434056 is an apocalyptic number.

It is an amenable number.

266697434056 is a deficient number, since it is larger than the sum of its proper divisors (233367091844).

266697434056 is a wasteful number, since it uses less digits than its factorization.

266697434056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455808 (or 455804 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 58.

The spelling of 266697434056 in words is "two hundred sixty-six billion, six hundred ninety-seven million, four hundred thirty-four thousand, fifty-six".