66607716 has 48 divisors (see below), whose sum is σ = 183357440. Its totient is φ = 18416160.

The previous prime is 66607679. The next prime is 66607741. The reversal of 66607716 is 61770666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10186 + ... + 15393.

Almost surely, 2^66607716 is an apocalyptic number.

It is an amenable number.

66607716 is an abundant number, since it is smaller than the sum of its proper divisors (116749724).

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

66607716 is a wasteful number, since it uses less digits than its factorization.

66607716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25624 (or 25622 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 66607716 is about 8161.3550345516. The cubic root of 66607716 is about 405.3605811722.

The spelling of 66607716 in words is "sixty-six million, six hundred seven thousand, seven hundred sixteen".