66169964 has 12 divisors (see below), whose sum is σ = 132339984. Its totient is φ = 28358544.

The previous prime is 66169931. The next prime is 66169969. The reversal of 66169964 is 46996166.

66169964 is an admirable number.

It is a super-2 number, since 2×66169964² = 8756928271522592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66169969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181579 + ... + 1181634.

It is an arithmetic number, because the mean of its divisors is an integer number (11028332).

Almost surely, 2^66169964 is an apocalyptic number.

It is an amenable number.

66169964 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66169964 is a wasteful number, since it uses less digits than its factorization.

66169964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363224 (or 2363222 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 66169964 is about 8134.4922398389. The cubic root of 66169964 is about 404.4706063819.

The spelling of 66169964 in words is "sixty-six million, one hundred sixty-nine thousand, nine hundred sixty-four".