161466631 has 8 divisors (see below), whose sum is σ = 171181184. Its totient is φ = 152033760.

The previous prime is 161466607. The next prime is 161466637. The reversal of 161466631 is 136664161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161466631 is a prime.

It is a super-2 number, since 2×161466631² = 52142945852980322, which 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 (161466637) 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, 69240 + ... + 71533.

It is an arithmetic number, because the mean of its divisors is an integer number (21397648).

Almost surely, 2^161466631 is an apocalyptic number.

161466631 is a deficient number, since it is larger than the sum of its proper divisors (9714553).

161466631 is a wasteful number, since it uses less digits than its factorization.

161466631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140841.

The product of its digits is 15552, while the sum is 34.

The square root of 161466631 is about 12706.9520735698. The cubic root of 161466631 is about 544.5372510572.

The spelling of 161466631 in words is "one hundred sixty-one million, four hundred sixty-six thousand, six hundred thirty-one".