66746164 has 12 divisors (see below), whose sum is σ = 122953600. Its totient is φ = 31616568.

The previous prime is 66746149. The next prime is 66746179. The reversal of 66746164 is 46164766.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66746149) and next prime (66746179).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439044 + ... + 439195.

Almost surely, 2^66746164 is an apocalyptic number.

It is an amenable number.

66746164 is a deficient number, since it is larger than the sum of its proper divisors (56207436).

66746164 is a wasteful number, since it uses less digits than its factorization.

66746164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878262 (or 878260 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 66746164 is about 8169.8325564237. The cubic root of 66746164 is about 405.6412419630.

The spelling of 66746164 in words is "sixty-six million, seven hundred forty-six thousand, one hundred sixty-four".