66955152 has 80 divisors (see below), whose sum is σ = 190041408. Its totient is φ = 20144640.

The previous prime is 66955111. The next prime is 66955159. The reversal of 66955152 is 25155966.

It is a self number, because there is not a number n which added to its sum of digits gives 66955152.

It is not an unprimeable number, because it can be changed into a prime (66955159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90978 + ... + 91710.

Almost surely, 2^66955152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66955152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95020704).

66955152 is an abundant number, since it is smaller than the sum of its proper divisors (123086256).

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

66955152 is a wasteful number, since it uses less digits than its factorization.

66955152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928 (or 922 counting only the distinct ones).

The product of its digits is 81000, while the sum is 39.

The square root of 66955152 is about 8182.6127856572. The cubic root of 66955152 is about 406.0641667774.

The spelling of 66955152 in words is "sixty-six million, nine hundred fifty-five thousand, one hundred fifty-two".