665150506656 has 96 divisors (see below), whose sum is σ = 1749373936128. Its totient is φ = 221291400960.

The previous prime is 665150506591. The next prime is 665150506661. The reversal of 665150506656 is 656605051566.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 665150506599 and 665150506608.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 151478221 + ... + 151482611.

It is an arithmetic number, because the mean of its divisors is an integer number (18222645168).

Almost surely, 2^665150506656 is an apocalyptic number.

It is an amenable number.

665150506656 is an abundant number, since it is smaller than the sum of its proper divisors (1084223429472).

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

665150506656 is a wasteful number, since it uses less digits than its factorization.

665150506656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074 (or 7066 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 665150506656 in words is "six hundred sixty-five billion, one hundred fifty million, five hundred six thousand, six hundred fifty-six".