64120000664 has 8 divisors (see below), whose sum is σ = 120225001260. Its totient is φ = 32060000328.

The previous prime is 64120000661. The next prime is 64120000673. The reversal of 64120000664 is 46600002146.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×64120000664² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64120000661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4007500034 + ... + 4007500049.

Almost surely, 2^64120000664 is an apocalyptic number.

It is an amenable number.

64120000664 is a deficient number, since it is larger than the sum of its proper divisors (56105000596).

64120000664 is a wasteful number, since it uses less digits than its factorization.

64120000664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8015000089 (or 8015000085 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 64120000664 in words is "sixty-four billion, one hundred twenty million, six hundred sixty-four", and thus it is an aban number.