16656666145 has 16 divisors (see below), whose sum is σ = 22869399168. Its totient is φ = 11408728320.

The previous prime is 16656666137. The next prime is 16656666149. The reversal of 16656666145 is 54166665661.

It is not a de Polignac number, because 16656666145 - 2³ = 16656666137 is a prime.

It is a super-2 number, since 2×16656666145² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16656666092 and 16656666101.

It is not an unprimeable number, because it can be changed into a prime (16656666149) 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, 239259 + ... + 300928.

It is an arithmetic number, because the mean of its divisors is an integer number (1429337448).

Almost surely, 2^16656666145 is an apocalyptic number.

It is an amenable number.

16656666145 is a deficient number, since it is larger than the sum of its proper divisors (6212733023).

16656666145 is an equidigital number, since it uses as much as digits as its factorization.

16656666145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541080.

The product of its digits is 4665600, while the sum is 52.

The spelling of 16656666145 in words is "sixteen billion, six hundred fifty-six million, six hundred sixty-six thousand, one hundred forty-five".