66164312 has 16 divisors (see below), whose sum is σ = 128336400. Its totient is φ = 31941280.

The previous prime is 66164303. The next prime is 66164347. The reversal of 66164312 is 21346166.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142364 + ... + 142827.

It is an arithmetic number, because the mean of its divisors is an integer number (8021025).

Almost surely, 2^66164312 is an apocalyptic number.

It is an amenable number.

66164312 is a deficient number, since it is larger than the sum of its proper divisors (62172088).

66164312 is a wasteful number, since it uses less digits than its factorization.

66164312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285226 (or 285222 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 66164312 is about 8134.1448229055. The cubic root of 66164312 is about 404.4590899132.

The spelling of 66164312 in words is "sixty-six million, one hundred sixty-four thousand, three hundred twelve".