161660315 has 8 divisors (see below), whose sum is σ = 194766768. Its totient is φ = 128812000.

The previous prime is 161660281. The next prime is 161660329. The reversal of 161660315 is 513066161.

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

It is not a de Polignac number, because 161660315 - 2¹⁶ = 161594779 is a prime.

It is a super-2 number, since 2×161660315² = 52268114891798450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63152 + ... + 65661.

It is an arithmetic number, because the mean of its divisors is an integer number (24345846).

Almost surely, 2^161660315 is an apocalyptic number.

161660315 is a deficient number, since it is larger than the sum of its proper divisors (33106453).

161660315 is a wasteful number, since it uses less digits than its factorization.

161660315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129069.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 161660315 is about 12714.5709719204. The cubic root of 161660315 is about 544.7548935708.

The spelling of 161660315 in words is "one hundred sixty-one million, six hundred sixty thousand, three hundred fifteen".