66264501 has 16 divisors (see below), whose sum is σ = 90664704. Its totient is φ = 43029504.

The previous prime is 66264491. The next prime is 66264503. The reversal of 66264501 is 10546266.

It is not a de Polignac number, because 66264501 - 2⁶ = 66264437 is a prime.

It is a Curzon number.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31845 + ... + 33861.

It is an arithmetic number, because the mean of its divisors is an integer number (5666544).

Almost surely, 2^66264501 is an apocalyptic number.

It is an amenable number.

66264501 is a deficient number, since it is larger than the sum of its proper divisors (24400203).

66264501 is a wasteful number, since it uses less digits than its factorization.

66264501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66264501 is about 8140.3010386594. The cubic root of 66264501 is about 404.6631370505.

The spelling of 66264501 in words is "sixty-six million, two hundred sixty-four thousand, five hundred one".