16660023909 has 8 divisors (see below), whose sum is σ = 22362448800. Its totient is φ = 11032140816.

The previous prime is 16660023901. The next prime is 16660023943. The reversal of 16660023909 is 90932006661.

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

It is not a de Polignac number, because 16660023909 - 2³ = 16660023901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660023901) 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, 18634927 + ... + 18635820.

It is an arithmetic number, because the mean of its divisors is an integer number (2795306100).

Almost surely, 2^16660023909 is an apocalyptic number.

It is an amenable number.

16660023909 is a deficient number, since it is larger than the sum of its proper divisors (5702424891).

16660023909 is a wasteful number, since it uses less digits than its factorization.

16660023909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37270899.

The product of its (nonzero) digits is 104976, while the sum is 42.

The spelling of 16660023909 in words is "sixteen billion, six hundred sixty million, twenty-three thousand, nine hundred nine".