161676611 has 4 divisors (see below), whose sum is σ = 161726712. Its totient is φ = 161626512.

The previous prime is 161676607. The next prime is 161676667. The reversal of 161676611 is 116676161.

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

It is a cyclic number.

It is not a de Polignac number, because 161676611 - 2² = 161676607 is a prime.

It is a super-2 number, since 2×161676611² = 52278653088890642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161676601) 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, 19850 + ... + 26783.

It is an arithmetic number, because the mean of its divisors is an integer number (40431678).

Almost surely, 2^161676611 is an apocalyptic number.

161676611 is a deficient number, since it is larger than the sum of its proper divisors (50101).

161676611 is an equidigital number, since it uses as much as digits as its factorization.

161676611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50100.

The product of its digits is 9072, while the sum is 35.

The square root of 161676611 is about 12715.2117953261. The cubic root of 161676611 is about 544.7731974393.

The spelling of 161676611 in words is "one hundred sixty-one million, six hundred seventy-six thousand, six hundred eleven".