12664703240 has 64 divisors (see below), whose sum is σ = 32576342400. Its totient is φ = 4340855808.

The previous prime is 12664703209. The next prime is 12664703243. The reversal of 12664703240 is 4230746621.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 12664703240.

It is not an unprimeable number, because it can be changed into a prime (12664703243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1478891 + ... + 1487429.

It is an arithmetic number, because the mean of its divisors is an integer number (509005350).

Almost surely, 2^12664703240 is an apocalyptic number.

12664703240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12664703240 is an abundant number, since it is smaller than the sum of its proper divisors (19911639160).

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

12664703240 is a wasteful number, since it uses less digits than its factorization.

12664703240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13854 (or 13850 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The spelling of 12664703240 in words is "twelve billion, six hundred sixty-four million, seven hundred three thousand, two hundred forty".