16660400735 has 16 divisors (see below), whose sum is σ = 21831582240. Its totient is φ = 12104653440.

The previous prime is 16660400719. The next prime is 16660400749. The reversal of 16660400735 is 53700406661.

It is a happy number.

16660400735 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16660400735 - 2⁴ = 16660400719 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 93800 + ... + 205229.

It is an arithmetic number, because the mean of its divisors is an integer number (1364473890).

Almost surely, 2^16660400735 is an apocalyptic number.

16660400735 is a deficient number, since it is larger than the sum of its proper divisors (5171181505).

16660400735 is a wasteful number, since it uses less digits than its factorization.

16660400735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300058.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 16660400735 in words is "sixteen billion, six hundred sixty million, four hundred thousand, seven hundred thirty-five".