361640665 has 8 divisors (see below), whose sum is σ = 434348928. Its totient is φ = 289059120.

The previous prime is 361640659. The next prime is 361640683. The reversal of 361640665 is 566046163.

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

It is not a de Polignac number, because 361640665 - 2¹⁷ = 361509593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25281 + ... + 36910.

It is an arithmetic number, because the mean of its divisors is an integer number (54293616).

Almost surely, 2^361640665 is an apocalyptic number.

It is an amenable number.

361640665 is a deficient number, since it is larger than the sum of its proper divisors (72708263).

361640665 is a wasteful number, since it uses less digits than its factorization.

361640665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63359.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 361640665 is about 19016.8521317278. The cubic root of 361640665 is about 712.4577030396.

The spelling of 361640665 in words is "three hundred sixty-one million, six hundred forty thousand, six hundred sixty-five".