664824683677 has 16 divisors (see below), whose sum is σ = 830251545984. Its totient is φ = 517183200000.

The previous prime is 664824683603. The next prime is 664824683681. The reversal of 664824683677 is 776386428466.

It is a cyclic number.

It is not a de Polignac number, because 664824683677 - 2²³ = 664816295069 is a prime.

It is a super-2 number, since 2×664824683677² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664824683177) 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, 7136824 + ... + 7229377.

It is an arithmetic number, because the mean of its divisors is an integer number (51890721624).

Almost surely, 2^664824683677 is an apocalyptic number.

It is an amenable number.

664824683677 is a deficient number, since it is larger than the sum of its proper divisors (165426862307).

664824683677 is a wasteful number, since it uses less digits than its factorization.

664824683677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14366820.

The product of its digits is 390168576, while the sum is 67.

The spelling of 664824683677 in words is "six hundred sixty-four billion, eight hundred twenty-four million, six hundred eighty-three thousand, six hundred seventy-seven".