165720794 has 8 divisors (see below), whose sum is σ = 263203668. Its totient is φ = 77986240.

The previous prime is 165720781. The next prime is 165720809. The reversal of 165720794 is 497027561.

165720794 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 159693769 + 6027025 = 12637^2 + 2455^2 .

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

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, 2437037 + ... + 2437104.

Almost surely, 2^165720794 is an apocalyptic number.

165720794 is a deficient number, since it is larger than the sum of its proper divisors (97482874).

165720794 is a wasteful number, since it uses less digits than its factorization.

165720794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874160.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 165720794 is about 12873.2588725621. The cubic root of 165720794 is about 549.2781649040.

The spelling of 165720794 in words is "one hundred sixty-five million, seven hundred twenty thousand, seven hundred ninety-four".