664164212 has 12 divisors (see below), whose sum is σ = 1199780736. Its totient is φ = 321369720.

The previous prime is 664164199. The next prime is 664164217. The reversal of 664164212 is 212461466.

It is a super-2 number, since 2×664164212² = 882228201003161888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664164217) by changing a digit.

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, 2677958 + ... + 2678205.

It is an arithmetic number, because the mean of its divisors is an integer number (99981728).

Almost surely, 2^664164212 is an apocalyptic number.

664164212 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

664164212 is a deficient number, since it is larger than the sum of its proper divisors (535616524).

664164212 is a wasteful number, since it uses less digits than its factorization.

664164212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356198 (or 5356196 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 664164212 is about 25771.3835872271. The cubic root of 664164212 is about 872.4860464705.

The spelling of 664164212 in words is "six hundred sixty-four million, one hundred sixty-four thousand, two hundred twelve".