16602401666 has 16 divisors (see below), whose sum is σ = 26853694560. Its totient is φ = 7672482720.

The previous prime is 16602401663. The next prime is 16602401677. The reversal of 16602401666 is 66610420661.

16602401666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (16602401663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5326556 + ... + 5329671.

It is an arithmetic number, because the mean of its divisors is an integer number (1678355910).

Almost surely, 2^16602401666 is an apocalyptic number.

16602401666 is a deficient number, since it is larger than the sum of its proper divisors (10251292894).

16602401666 is a wasteful number, since it uses less digits than its factorization.

16602401666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10656289.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 16602401666 in words is "sixteen billion, six hundred two million, four hundred one thousand, six hundred sixty-six".