665151585144 has 64 divisors (see below), whose sum is σ = 1760828025600. Its totient is φ = 208659285504.

The previous prime is 665151585103. The next prime is 665151585233. The reversal of 665151585144 is 441585151566.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6122869 + ... + 6230555.

It is an arithmetic number, because the mean of its divisors is an integer number (27512937900).

Almost surely, 2^665151585144 is an apocalyptic number.

It is an amenable number.

665151585144 is an abundant number, since it is smaller than the sum of its proper divisors (1095676440456).

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

665151585144 is a wasteful number, since it uses less digits than its factorization.

665151585144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122852 (or 122848 counting only the distinct ones).

The product of its digits is 2880000, while the sum is 51.

The spelling of 665151585144 in words is "six hundred sixty-five billion, one hundred fifty-one million, five hundred eighty-five thousand, one hundred forty-four".