165860973 has 16 divisors (see below), whose sum is σ = 252362560. Its totient is φ = 107584848.

The previous prime is 165860969. The next prime is 165861001. The reversal of 165860973 is 379068561.

It is a happy number.

It is not a de Polignac number, because 165860973 - 2² = 165860969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165860273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82015 + ... + 84012.

It is an arithmetic number, because the mean of its divisors is an integer number (15772660).

Almost surely, 2^165860973 is an apocalyptic number.

It is an amenable number.

165860973 is a deficient number, since it is larger than the sum of its proper divisors (86501587).

165860973 is a wasteful number, since it uses less digits than its factorization.

165860973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166073 (or 166067 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 165860973 is about 12878.7023026390. The cubic root of 165860973 is about 549.4329947279.

The spelling of 165860973 in words is "one hundred sixty-five million, eight hundred sixty thousand, nine hundred seventy-three".