66264500 has 24 divisors (see below), whose sum is σ = 144722760. Its totient is φ = 26505600.

The previous prime is 66264491. The next prime is 66264503. The reversal of 66264500 is 546266.

It can be written as a sum of positive squares in 4 ways, for example, as 4892944 + 61371556 = 2212^2 + 7834^2 .

It is a hoax number, since the sum of its digits (29) 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 (66264503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65765 + ... + 66764.

It is an arithmetic number, because the mean of its divisors is an integer number (6030115).

Almost surely, 2^66264500 is an apocalyptic number.

It is an amenable number.

66264500 is an abundant number, since it is smaller than the sum of its proper divisors (78458260).

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

66264500 is a wasteful number, since it uses less digits than its factorization.

66264500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132548 (or 132536 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 66264500 is about 8140.3009772367. The cubic root of 66264500 is about 404.6631350149.

The spelling of 66264500 in words is "sixty-six million, two hundred sixty-four thousand, five hundred".