665150121276 has 24 divisors (see below), whose sum is σ = 1556006721360. Its totient is φ = 221146739712.

The previous prime is 665150121241. The next prime is 665150121283. The reversal of 665150121276 is 672121051566.

665150121276 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71241061 + ... + 71250396.

It is an arithmetic number, because the mean of its divisors is an integer number (64833613390).

Almost surely, 2^665150121276 is an apocalyptic number.

It is an amenable number.

665150121276 is an abundant number, since it is smaller than the sum of its proper divisors (890856600084).

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

665150121276 is a wasteful number, since it uses less digits than its factorization.

665150121276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142491853 (or 142491851 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 665150121276 in words is "six hundred sixty-five billion, one hundred fifty million, one hundred twenty-one thousand, two hundred seventy-six".