16662215406 has 32 divisors (see below), whose sum is σ = 35303778720. Its totient is φ = 5224534016.

The previous prime is 16662215393. The next prime is 16662215413. The reversal of 16662215406 is 60451226661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149440 + ... + 235916.

It is an arithmetic number, because the mean of its divisors is an integer number (1103243085).

Almost surely, 2^16662215406 is an apocalyptic number.

16662215406 is an abundant number, since it is smaller than the sum of its proper divisors (18641563314).

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

16662215406 is a wasteful number, since it uses less digits than its factorization.

16662215406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88388.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 16662215406 in words is "sixteen billion, six hundred sixty-two million, two hundred fifteen thousand, four hundred six".