66051675 has 36 divisors (see below), whose sum is σ = 119097784. Its totient is φ = 34992000.

The previous prime is 66051659. The next prime is 66051679. The reversal of 66051675 is 57615066.

It is a happy number.

It is not a de Polignac number, because 66051675 - 2⁴ = 66051659 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66051679) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35775 + ... + 37575.

Almost surely, 2^66051675 is an apocalyptic number.

66051675 is a deficient number, since it is larger than the sum of its proper divisors (53046109).

66051675 is a wasteful number, since it uses less digits than its factorization.

66051675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980 (or 1972 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 66051675 is about 8127.2181587552. The cubic root of 66051675 is about 404.2294447895.

The spelling of 66051675 in words is "sixty-six million, fifty-one thousand, six hundred seventy-five".