12664020 has 24 divisors (see below), whose sum is σ = 35459424. Its totient is φ = 3377056.

The previous prime is 12664019. The next prime is 12664021. The reversal of 12664020 is 2046621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12664019) and next prime (12664021).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105474 + ... + 105593.

It is an arithmetic number, because the mean of its divisors is an integer number (1477476).

Almost surely, 2^12664020 is an apocalyptic number.

12664020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12664020 is an abundant number, since it is smaller than the sum of its proper divisors (22795404).

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

12664020 is a wasteful number, since it uses less digits than its factorization.

12664020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211079 (or 211077 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 12664020 is about 3558.6542400183. The cubic root of 12664020 is about 233.0901184553.

It can be divided in two parts, 126 and 64020, that added together give a palindrome (64146).

The spelling of 12664020 in words is "twelve million, six hundred sixty-four thousand, twenty".