165940378 has 8 divisors (see below), whose sum is σ = 257493780. Its totient is φ = 80109120.

The previous prime is 165940363. The next prime is 165940399. The reversal of 165940378 is 873049561.

It can be written as a sum of positive squares in 2 ways, for example, as 165559689 + 380689 = 12867^2 + 617^2 .

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, 1430463 + ... + 1430578.

Almost surely, 2^165940378 is an apocalyptic number.

165940378 is a deficient number, since it is larger than the sum of its proper divisors (91553402).

165940378 is a wasteful number, since it uses less digits than its factorization.

165940378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861072.

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

The square root of 165940378 is about 12881.7847365961. The cubic root of 165940378 is about 549.5206600495.

The spelling of 165940378 in words is "one hundred sixty-five million, nine hundred forty thousand, three hundred seventy-eight".