66137704 has 16 divisors (see below), whose sum is σ = 125288100. Its totient is φ = 32727552.

The previous prime is 66137681. The next prime is 66137711. The reversal of 66137704 is 40773166.

It can be written as a sum of positive squares in 2 ways, for example, as 66096900 + 40804 = 8130^2 + 202^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66137704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41839 + ... + 43390.

Almost surely, 2^66137704 is an apocalyptic number.

It is an amenable number.

66137704 is a deficient number, since it is larger than the sum of its proper divisors (59150396).

66137704 is a wasteful number, since it uses less digits than its factorization.

66137704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85332 (or 85328 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 66137704 is about 8132.5090839175. The cubic root of 66137704 is about 404.4048648580.

The spelling of 66137704 in words is "sixty-six million, one hundred thirty-seven thousand, seven hundred four".