161660927 has 4 divisors (see below), whose sum is σ = 161957016. Its totient is φ = 161364840.

The previous prime is 161660899. The next prime is 161660929. The reversal of 161660927 is 729066161.

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 161660927 - 2⁸ = 161660671 is a prime.

It is a super-2 number, since 2×161660927² = 52268510636998658, 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 (161660929) 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, 147224 + ... + 148317.

It is an arithmetic number, because the mean of its divisors is an integer number (40489254).

Almost surely, 2^161660927 is an apocalyptic number.

161660927 is a deficient number, since it is larger than the sum of its proper divisors (296089).

161660927 is an equidigital number, since it uses as much as digits as its factorization.

161660927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296088.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 161660927 is about 12714.5950387734. The cubic root of 161660927 is about 544.7555809990.

The spelling of 161660927 in words is "one hundred sixty-one million, six hundred sixty thousand, nine hundred twenty-seven".