66975132 has 48 divisors (see below), whose sum is σ = 180357632. Its totient is φ = 18947520.

The previous prime is 66975131. The next prime is 66975163. The reversal of 66975132 is 23157966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66975131) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4782 + ... + 12522.

Almost surely, 2^66975132 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 66975132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90178816).

66975132 is an abundant number, since it is smaller than the sum of its proper divisors (113382500).

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

66975132 is a wasteful number, since it uses less digits than its factorization.

66975132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7858 (or 7856 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 66975132 is about 8183.8335760205. The cubic root of 66975132 is about 406.1045537874.

The spelling of 66975132 in words is "sixty-six million, nine hundred seventy-five thousand, one hundred thirty-two".