16765066642 has 8 divisors (see below), whose sum is σ = 25257415500. Its totient is φ = 8345928144.

The previous prime is 16765066621. The next prime is 16765066657. The reversal of 16765066642 is 24666056761.

It can be written as a sum of positive squares in 2 ways, for example, as 12694754241 + 4070312401 = 112671^2 + 63799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 18302017 + ... + 18302932.

Almost surely, 2^16765066642 is an apocalyptic number.

16765066642 is a deficient number, since it is larger than the sum of its proper divisors (8492348858).

16765066642 is a wasteful number, since it uses less digits than its factorization.

16765066642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36605180.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 16765066642 in words is "sixteen billion, seven hundred sixty-five million, sixty-six thousand, six hundred forty-two".