66264156 has 72 divisors (see below), whose sum is σ = 198540160. Its totient is φ = 18930672.

The previous prime is 66264131. The next prime is 66264169. The reversal of 66264156 is 65146266.

It is a happy number.

66264156 is a `hidden beast` number, since 6 + 6 + 2 + 641 + 5 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66264156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1935 + ... + 11673.

Almost surely, 2^66264156 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 66264156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99270080).

66264156 is an abundant number, since it is smaller than the sum of its proper divisors (132276004).

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

66264156 is a wasteful number, since it uses less digits than its factorization.

66264156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9765 (or 9751 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 66264156 is about 8140.2798477694. The cubic root of 66264156 is about 404.6624347688.

The spelling of 66264156 in words is "sixty-six million, two hundred sixty-four thousand, one hundred fifty-six".