266697434057 has 4 divisors (see below), whose sum is σ = 266713095936. Its totient is φ = 266681772180.

The previous prime is 266697434033. The next prime is 266697434071. The reversal of 266697434057 is 750434796662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 750434796662 = 2 ⋅375217398331.

It is a cyclic number.

It is not a de Polignac number, because 266697434057 - 2⁶ = 266697433993 is a prime.

It is a super-2 number, since 2×266697434057² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266697433987 and 266697434005.

It is not an unprimeable number, because it can be changed into a prime (266697434027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7805369 + ... + 7839462.

It is an arithmetic number, because the mean of its divisors is an integer number (66678273984).

Almost surely, 2^266697434057 is an apocalyptic number.

It is an amenable number.

266697434057 is a deficient number, since it is larger than the sum of its proper divisors (15661879).

266697434057 is a wasteful number, since it uses less digits than its factorization.

266697434057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15661878.

The product of its (nonzero) digits is 45722880, while the sum is 59.

The spelling of 266697434057 in words is "two hundred sixty-six billion, six hundred ninety-seven million, four hundred thirty-four thousand, fifty-seven".