66552732 has 24 divisors (see below), whose sum is σ = 172544400. Its totient is φ = 22184208.

The previous prime is 66552719. The next prime is 66552749. The reversal of 66552732 is 23725566.

It is a happy number.

It is a super-2 number, since 2×66552732² = 8858532273327648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 308007 + ... + 308222.

It is an arithmetic number, because the mean of its divisors is an integer number (7189350).

Almost surely, 2^66552732 is an apocalyptic number.

It is an amenable number.

66552732 is an abundant number, since it is smaller than the sum of its proper divisors (105991668).

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

66552732 is a wasteful number, since it uses less digits than its factorization.

66552732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616242 (or 616234 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 66552732 is about 8157.9857808162. The cubic root of 66552732 is about 405.2490101046.

The spelling of 66552732 in words is "sixty-six million, five hundred fifty-two thousand, seven hundred thirty-two".