16750031661 has 16 divisors (see below), whose sum is σ = 27070758720. Its totient is φ = 10151534160.

The previous prime is 16750031629. The next prime is 16750031687. The reversal of 16750031661 is 16613005761.

16750031661 is a `hidden beast` number, since 1 + 67 + 500 + 31 + 6 + 61 = 666.

It is not a de Polignac number, because 16750031661 - 2⁵ = 16750031629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16750031611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28198410 + ... + 28199003.

It is an arithmetic number, because the mean of its divisors is an integer number (1691922420).

Almost surely, 2^16750031661 is an apocalyptic number.

16750031661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16750031661 is a deficient number, since it is larger than the sum of its proper divisors (10320727059).

16750031661 is a wasteful number, since it uses less digits than its factorization.

16750031661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56397433 (or 56397427 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 16750031661 in words is "sixteen billion, seven hundred fifty million, thirty-one thousand, six hundred sixty-one".