64626006664 has 32 divisors (see below), whose sum is σ = 121733429400. Its totient is φ = 32163886080.

The previous prime is 64626006659. The next prime is 64626006689. The reversal of 64626006664 is 46660062646.

It can be written as a sum of positive squares in 4 ways, for example, as 56801188900 + 7824817764 = 238330^2 + 88458^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4923342 + ... + 4936450.

Almost surely, 2^64626006664 is an apocalyptic number.

It is an amenable number.

64626006664 is a deficient number, since it is larger than the sum of its proper divisors (57107422736).

64626006664 is a wasteful number, since it uses less digits than its factorization.

64626006664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15913 (or 15909 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 46.

The spelling of 64626006664 in words is "sixty-four billion, six hundred twenty-six million, six thousand, six hundred sixty-four".