16651166498 has 4 divisors (see below), whose sum is σ = 24976749750. Its totient is φ = 8325583248.

The previous prime is 16651166479. The next prime is 16651166513. The reversal of 16651166498 is 89466115661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16637646169 + 13520329 = 128987^2 + 3677^2 .

It is a super-2 number, since 2×16651166498² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4162791623 + ... + 4162791626.

Almost surely, 2^16651166498 is an apocalyptic number.

16651166498 is a deficient number, since it is larger than the sum of its proper divisors (8325583252).

16651166498 is an equidigital number, since it uses as much as digits as its factorization.

16651166498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8325583251.

The product of its digits is 1866240, while the sum is 53.

The spelling of 16651166498 in words is "sixteen billion, six hundred fifty-one million, one hundred sixty-six thousand, four hundred ninety-eight".