665015126073072 has 20 divisors (see below), whose sum is σ = 1717955742355560. Its totient is φ = 221671708691008.

The previous prime is 665015126073047. The next prime is 665015126073091. The reversal of 665015126073072 is 270370621510566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6927240896547 + ... + 6927240896642.

It is an arithmetic number, because the mean of its divisors is an integer number (85897787117778).

Almost surely, 2^{665015126073072} is an apocalyptic number.

It is an amenable number.

665015126073072 is an abundant number, since it is smaller than the sum of its proper divisors (1052940616282488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665015126073072 is a wasteful number, since it uses less digits than its factorization.

665015126073072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13854481793200 (or 13854481793194 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 665015126073072 in words is "six hundred sixty-five trillion, fifteen billion, one hundred twenty-six million, seventy-three thousand, seventy-two".