165940806 has 8 divisors (see below), whose sum is σ = 331881624. Its totient is φ = 55313600.

The previous prime is 165940781. The next prime is 165940811. The reversal of 165940806 is 608049561.

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

165940806 is an admirable number.

It is a congruent number.

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, 13828395 + ... + 13828406.

It is an arithmetic number, because the mean of its divisors is an integer number (41485203).

Almost surely, 2^165940806 is an apocalyptic number.

165940806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165940806 is a wasteful number, since it uses less digits than its factorization.

165940806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27656806.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 165940806 is about 12881.8013491903. The cubic root of 165940806 is about 549.5211324976.

The spelling of 165940806 in words is "one hundred sixty-five million, nine hundred forty thousand, eight hundred six".