666121152 has 56 divisors (see below), whose sum is σ = 1855216000. Its totient is φ = 210352896.

The previous prime is 666121129. The next prime is 666121153. The reversal of 666121152 is 251121666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666121153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87652 + ... + 94947.

Almost surely, 2^666121152 is an apocalyptic number.

It is an amenable number.

666121152 is an abundant number, since it is smaller than the sum of its proper divisors (1189094848).

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

666121152 is a wasteful number, since it uses less digits than its factorization.

666121152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182633 (or 182623 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 666121152 is about 25809.3229667111. The cubic root of 666121152 is about 873.3421242373.

The spelling of 666121152 in words is "six hundred sixty-six million, one hundred twenty-one thousand, one hundred fifty-two".