66377616 has 40 divisors (see below), whose sum is σ = 173899584. Its totient is φ = 21813120.

The previous prime is 66377611. The next prime is 66377627. The reversal of 66377616 is 61677366.

It is not an unprimeable number, because it can be changed into a prime (66377611) 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, 6331 + ... + 13146.

Almost surely, 2^66377616 is an apocalyptic number.

It is an amenable number.

66377616 is an abundant number, since it is smaller than the sum of its proper divisors (107521968).

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

66377616 is a wasteful number, since it uses less digits than its factorization.

66377616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19559 (or 19553 counting only the distinct ones).

The product of its digits is 190512, while the sum is 42.

The square root of 66377616 is about 8147.2459150317. The cubic root of 66377616 is about 404.8932625288.

The spelling of 66377616 in words is "sixty-six million, three hundred seventy-seven thousand, six hundred sixteen".