266157620017 has 4 divisors (see below), whose sum is σ = 266413788160. Its totient is φ = 265901451876.

The previous prime is 266157620009. The next prime is 266157620041. The reversal of 266157620017 is 710026751662.

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.

It is a cyclic number.

It is not a de Polignac number, because 266157620017 - 2³ = 266157620009 is a prime.

It is a super-2 number, since 2×266157620017² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266157620317) 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, 128082513 + ... + 128084590.

It is an arithmetic number, because the mean of its divisors is an integer number (66603447040).

Almost surely, 2^266157620017 is an apocalyptic number.

It is an amenable number.

266157620017 is a deficient number, since it is larger than the sum of its proper divisors (256168143).

266157620017 is a wasteful number, since it uses less digits than its factorization.

266157620017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256168142.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 266157620017 in words is "two hundred sixty-six billion, one hundred fifty-seven million, six hundred twenty thousand, seventeen".