665520255150 has 48 divisors (see below), whose sum is σ = 1737358147200. Its totient is φ = 168131432160.

The previous prime is 665520255119. The next prime is 665520255173. The reversal of 665520255150 is 51552025566.

It is a super-2 number, since 2×665520255150² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 116755090 + ... + 116760789.

It is an arithmetic number, because the mean of its divisors is an integer number (36194961400).

Almost surely, 2^665520255150 is an apocalyptic number.

665520255150 is an abundant number, since it is smaller than the sum of its proper divisors (1071837892050).

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

665520255150 is a wasteful number, since it uses less digits than its factorization.

665520255150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233515913 (or 233515908 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 42.

The spelling of 665520255150 in words is "six hundred sixty-five billion, five hundred twenty million, two hundred fifty-five thousand, one hundred fifty".