16801666602 has 16 divisors (see below), whose sum is σ = 38403809472. Its totient is φ = 4800476160.

The previous prime is 16801666597. The next prime is 16801666603. The reversal of 16801666602 is 20666610861.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 400039681 = 16801666602 / (1 + 6 + 8 + 0 + 1 + 6 + 6 + 6 + 6 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (16801666603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200019799 + ... + 200019882.

It is an arithmetic number, because the mean of its divisors is an integer number (2400238092).

Almost surely, 2^16801666602 is an apocalyptic number.

16801666602 is an abundant number, since it is smaller than the sum of its proper divisors (21602142870).

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

16801666602 is a wasteful number, since it uses less digits than its factorization.

16801666602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400039693.

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 16801666602 in words is "sixteen billion, eight hundred one million, six hundred sixty-six thousand, six hundred two".