165973408 has 24 divisors (see below), whose sum is σ = 327983040. Its totient is φ = 82676160.

The previous prime is 165973387. The next prime is 165973429. The reversal of 165973408 is 804379561.

It is an interprime number because it is at equal distance from previous prime (165973387) and next prime (165973429).

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 898 + ... + 18241.

It is an arithmetic number, because the mean of its divisors is an integer number (13665960).

Almost surely, 2^165973408 is an apocalyptic number.

It is an amenable number.

165973408 is a deficient number, since it is larger than the sum of its proper divisors (162009632).

165973408 is a wasteful number, since it uses less digits than its factorization.

165973408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19420 (or 19412 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 165973408 is about 12883.0667156543. The cubic root of 165973408 is about 549.5571178493.

The spelling of 165973408 in words is "one hundred sixty-five million, nine hundred seventy-three thousand, four hundred eight".