666651444110635 has 16 divisors (see below), whose sum is σ = 813171055453632. Its totient is φ = 524529883670400.

The previous prime is 666651444110609. The next prime is 666651444110647. The reversal of 666651444110635 is 536011444156666.

It is not a de Polignac number, because 666651444110635 - 2⁹ = 666651444110123 is a prime.

It is a super-2 number, since 2×666651444110635² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666651444110635.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97310839 + ... + 103936048.

It is an arithmetic number, because the mean of its divisors is an integer number (50823190965852).

Almost surely, 2^{666651444110635} is an apocalyptic number.

666651444110635 is a deficient number, since it is larger than the sum of its proper divisors (146519611342997).

666651444110635 is a wasteful number, since it uses less digits than its factorization.

666651444110635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201257814.

The product of its (nonzero) digits is 37324800, while the sum is 58.

The spelling of 666651444110635 in words is "six hundred sixty-six trillion, six hundred fifty-one billion, four hundred forty-four million, one hundred ten thousand, six hundred thirty-five".