16675481657 has 4 divisors (see below), whose sum is σ = 17063283600. Its totient is φ = 16287679716.

The previous prime is 16675481633. The next prime is 16675481659. The reversal of 16675481657 is 75618457661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75618457661 = 601 ⋅125821061.

It is a cyclic number.

It is not a de Polignac number, because 16675481657 - 2⁶ = 16675481593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16675481659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193900907 + ... + 193900992.

It is an arithmetic number, because the mean of its divisors is an integer number (4265820900).

Almost surely, 2^16675481657 is an apocalyptic number.

It is an amenable number.

16675481657 is a deficient number, since it is larger than the sum of its proper divisors (387801943).

16675481657 is an equidigital number, since it uses as much as digits as its factorization.

16675481657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387801942.

The product of its digits is 8467200, while the sum is 56.

The spelling of 16675481657 in words is "sixteen billion, six hundred seventy-five million, four hundred eighty-one thousand, six hundred fifty-seven".