664612233065 has 32 divisors (see below), whose sum is σ = 893438622720. Its totient is φ = 470411596800.

The previous prime is 664612233017. The next prime is 664612233079. The reversal of 664612233065 is 560332216466.

It is not a de Polignac number, because 664612233065 - 2⁶ = 664612233001 is a prime.

It is a super-3 number, since 3×664612233065³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 561992 + ... + 1282598.

It is an arithmetic number, because the mean of its divisors is an integer number (27919956960).

Almost surely, 2^664612233065 is an apocalyptic number.

It is an amenable number.

664612233065 is a deficient number, since it is larger than the sum of its proper divisors (228826389655).

664612233065 is a wasteful number, since it uses less digits than its factorization.

664612233065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721073.

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 664612233065 in words is "six hundred sixty-four billion, six hundred twelve million, two hundred thirty-three thousand, sixty-five".