161567668 has 12 divisors (see below), whose sum is σ = 282916480. Its totient is φ = 80734392.

The previous prime is 161567647. The next prime is 161567683. The reversal of 161567668 is 866765161.

It is a super-2 number, since 2×161567668² = 52208222685916448, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4446 + ... + 18517.

Almost surely, 2^161567668 is an apocalyptic number.

It is an amenable number.

161567668 is a deficient number, since it is larger than the sum of its proper divisors (121348812).

161567668 is a wasteful number, since it uses less digits than its factorization.

161567668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24726 (or 24724 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 161567668 is about 12710.9271101678. The cubic root of 161567668 is about 544.6508079328.

The spelling of 161567668 in words is "one hundred sixty-one million, five hundred sixty-seven thousand, six hundred sixty-eight".