16660501401 has 8 divisors (see below), whose sum is σ = 22244310400. Its totient is φ = 11091846672.

The previous prime is 16660501387. The next prime is 16660501409. The reversal of 16660501401 is 10410506661.

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

It is not a de Polignac number, because 16660501401 - 2⁵ = 16660501369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16660501409) 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, 3786001 + ... + 3790398.

It is an arithmetic number, because the mean of its divisors is an integer number (2780538800).

Almost surely, 2^16660501401 is an apocalyptic number.

It is an amenable number.

16660501401 is a deficient number, since it is larger than the sum of its proper divisors (5583808999).

16660501401 is an equidigital number, since it uses as much as digits as its factorization.

16660501401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7577135.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 16660501401 in words is "sixteen billion, six hundred sixty million, five hundred one thousand, four hundred one".