66164252 has 72 divisors (see below), whose sum is σ = 148364160. Its totient is φ = 25264800.

The previous prime is 66164243. The next prime is 66164257. The reversal of 66164252 is 25246166.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66164257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199727 + ... + 200057.

Almost surely, 2^66164252 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 66164252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74182080).

66164252 is an abundant number, since it is smaller than the sum of its proper divisors (82199908).

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

66164252 is a wasteful number, since it uses less digits than its factorization.

66164252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 410 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 66164252 is about 8134.1411347480. The cubic root of 66164252 is about 404.4589676542.

The spelling of 66164252 in words is "sixty-six million, one hundred sixty-four thousand, two hundred fifty-two".