66652272 has 30 divisors (see below), whose sum is σ = 186534192. Its totient is φ = 22217376.

The previous prime is 66652249. The next prime is 66652273. The reversal of 66652272 is 27225666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66652273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 231288 + ... + 231575.

Almost surely, 2^66652272 is an apocalyptic number.

It is an amenable number.

66652272 is an abundant number, since it is smaller than the sum of its proper divisors (119881920).

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

66652272 is a wasteful number, since it uses less digits than its factorization.

66652272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462877 (or 462868 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 66652272 is about 8164.0842719805. The cubic root of 66652272 is about 405.4509471807.

The spelling of 66652272 in words is "sixty-six million, six hundred fifty-two thousand, two hundred seventy-two".