16618672257 has 8 divisors (see below), whose sum is σ = 24172614240. Its totient is φ = 10071922560.

The previous prime is 16618672199. The next prime is 16618672267. The reversal of 16618672257 is 75227681661.

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

It is not a de Polignac number, because 16618672257 - 2⁷ = 16618672129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16618672267) 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, 251798032 + ... + 251798097.

It is an arithmetic number, because the mean of its divisors is an integer number (3021576780).

Almost surely, 2^16618672257 is an apocalyptic number.

It is an amenable number.

16618672257 is a deficient number, since it is larger than the sum of its proper divisors (7553941983).

16618672257 is a wasteful number, since it uses less digits than its factorization.

16618672257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503596143.

The product of its digits is 1693440, while the sum is 51.

The spelling of 16618672257 in words is "sixteen billion, six hundred eighteen million, six hundred seventy-two thousand, two hundred fifty-seven".