18660660012 has 48 divisors (see below), whose sum is σ = 50482951680. Its totient is φ = 5949774864.

The previous prime is 18660660001. The next prime is 18660660023. The reversal of 18660660012 is 21006606681.

It is an interprime number because it is at equal distance from previous prime (18660660001) and next prime (18660660023).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3753688 + ... + 3758655.

It is an arithmetic number, because the mean of its divisors is an integer number (1051728160).

Almost surely, 2^18660660012 is an apocalyptic number.

18660660012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18660660012 is an abundant number, since it is smaller than the sum of its proper divisors (31822291668).

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

18660660012 is a wasteful number, since it uses less digits than its factorization.

18660660012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7512379 (or 7512371 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 18660660012 in words is "eighteen billion, six hundred sixty million, six hundred sixty thousand, twelve".