666454646365 has 16 divisors (see below), whose sum is σ = 841859781120. Its totient is φ = 505089069120.

The previous prime is 666454646339. The next prime is 666454646383. The reversal of 666454646365 is 563646454666.

It is not a de Polignac number, because 666454646365 - 2⁷ = 666454646237 is a prime.

It is a super-2 number, since 2×666454646365² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 4921747 + ... + 5055343.

It is an arithmetic number, because the mean of its divisors is an integer number (52616236320).

Almost surely, 2^666454646365 is an apocalyptic number.

It is an amenable number.

666454646365 is a deficient number, since it is larger than the sum of its proper divisors (175405134755).

666454646365 is a wasteful number, since it uses less digits than its factorization.

666454646365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186132.

The product of its digits is 223948800, while the sum is 61.

The spelling of 666454646365 in words is "six hundred sixty-six billion, four hundred fifty-four million, six hundred forty-six thousand, three hundred sixty-five".