685776666201 has 32 divisors (see below), whose sum is σ = 1007968002048. Its totient is φ = 411280112640.

The previous prime is 685776666161. The next prime is 685776666247. The reversal of 685776666201 is 102666677586.

It is not a de Polignac number, because 685776666201 - 2³⁰ = 684702924377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685776666271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 949945 + ... + 1507961.

It is an arithmetic number, because the mean of its divisors is an integer number (31499000064).

Almost surely, 2^685776666201 is an apocalyptic number.

It is an amenable number.

685776666201 is a deficient number, since it is larger than the sum of its proper divisors (322191335847).

685776666201 is a wasteful number, since it uses less digits than its factorization.

685776666201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558421.

The product of its (nonzero) digits is 30481920, while the sum is 60.

The spelling of 685776666201 in words is "six hundred eighty-five billion, seven hundred seventy-six million, six hundred sixty-six thousand, two hundred one".