16660374630021 has 8 divisors (see below), whose sum is σ = 24682036488960. Its totient is φ = 11106916419996.

The previous prime is 16660374630019. The next prime is 16660374630083. The reversal of 16660374630021 is 12003647306661.

It is not a de Polignac number, because 16660374630021 - 2¹ = 16660374630019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660374638021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308525456085 + ... + 308525456138.

It is an arithmetic number, because the mean of its divisors is an integer number (3085254561120).

Almost surely, 2^{16660374630021} is an apocalyptic number.

It is an amenable number.

16660374630021 is a deficient number, since it is larger than the sum of its proper divisors (8021661858939).

16660374630021 is an equidigital number, since it uses as much as digits as its factorization.

16660374630021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617050912232 (or 617050912226 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 16660374630021 in words is "sixteen trillion, six hundred sixty billion, three hundred seventy-four million, six hundred thirty thousand, twenty-one".