16651396677 has 8 divisors (see below), whose sum is σ = 22231194016. Its totient is φ = 11086265232.

The previous prime is 16651396673. The next prime is 16651396693. The reversal of 16651396677 is 77669315661.

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

It is not a de Polignac number, because 16651396677 - 2² = 16651396673 is a prime.

It is a super-2 number, since 2×16651396677² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16651396673) 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, 3663823 + ... + 3668364.

It is an arithmetic number, because the mean of its divisors is an integer number (2778899252).

Almost surely, 2^16651396677 is an apocalyptic number.

It is an amenable number.

16651396677 is a deficient number, since it is larger than the sum of its proper divisors (5579797339).

16651396677 is an equidigital number, since it uses as much as digits as its factorization.

16651396677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332947.

The product of its digits is 8573040, while the sum is 57.

The spelling of 16651396677 in words is "sixteen billion, six hundred fifty-one million, three hundred ninety-six thousand, six hundred seventy-seven".