66057706 has 48 divisors (see below), whose sum is σ = 118847520. Its totient is φ = 27293760.

The previous prime is 66057703. The next prime is 66057707. The reversal of 66057706 is 60775066.

It is not an unprimeable number, because it can be changed into a prime (66057703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 405181 + ... + 405343.

It is an arithmetic number, because the mean of its divisors is an integer number (2475990).

Almost surely, 2^66057706 is an apocalyptic number.

66057706 is a deficient number, since it is larger than the sum of its proper divisors (52789814).

66057706 is a wasteful number, since it uses less digits than its factorization.

66057706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 66057706 is about 8127.5891874528. The cubic root of 66057706 is about 404.2417474479.

The spelling of 66057706 in words is "sixty-six million, fifty-seven thousand, seven hundred six".