66121152 has 56 divisors (see below), whose sum is σ = 175546512. Its totient is φ = 21964800.

The previous prime is 66121127. The next prime is 66121169. The reversal of 66121152 is 25112166.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 99702 + ... + 100362.

Almost surely, 2^66121152 is an apocalyptic number.

It is an amenable number.

66121152 is an abundant number, since it is smaller than the sum of its proper divisors (109425360).

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

66121152 is a wasteful number, since it uses less digits than its factorization.

66121152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197 (or 1187 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 66121152 is about 8131.4913761253. The cubic root of 66121152 is about 404.3711258186.

The spelling of 66121152 in words is "sixty-six million, one hundred twenty-one thousand, one hundred fifty-two".