66504937 has 16 divisors (see below), whose sum is σ = 71285760. Its totient is φ = 61907472.

The previous prime is 66504913. The next prime is 66504943. The reversal of 66504937 is 73940566.

It is a cyclic number.

It is not a de Polignac number, because 66504937 - 2¹¹ = 66502889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66504937.

It is not an unprimeable number, because it can be changed into a prime (66504637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158514 + ... + 158932.

It is an arithmetic number, because the mean of its divisors is an integer number (4455360).

Almost surely, 2^66504937 is an apocalyptic number.

66504937 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

66504937 is a deficient number, since it is larger than the sum of its proper divisors (4780823).

66504937 is a wasteful number, since it uses less digits than its factorization.

66504937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 66504937 is about 8155.0559164239. The cubic root of 66504937 is about 405.1519766981.

The spelling of 66504937 in words is "sixty-six million, five hundred four thousand, nine hundred thirty-seven".