664860354677 has 16 divisors (see below), whose sum is σ = 675856742400. Its totient is φ = 653941374912.

The previous prime is 664860354583. The next prime is 664860354679. The reversal of 664860354677 is 776453068466.

It is a cyclic number.

It is not a de Polignac number, because 664860354677 - 2¹⁴ = 664860338293 is a prime.

It is a super-3 number, since 3×664860354677³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664860354679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17687699 + ... + 17725247.

It is an arithmetic number, because the mean of its divisors is an integer number (42241046400).

Almost surely, 2^664860354677 is an apocalyptic number.

It is an amenable number.

664860354677 is a deficient number, since it is larger than the sum of its proper divisors (10996387723).

664860354677 is a wasteful number, since it uses less digits than its factorization.

664860354677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38572.

The product of its (nonzero) digits is 121927680, while the sum is 62.

The spelling of 664860354677 in words is "six hundred sixty-four billion, eight hundred sixty million, three hundred fifty-four thousand, six hundred seventy-seven".