50018665 has 4 divisors (see below), whose sum is σ = 60022404. Its totient is φ = 40014928.

The previous prime is 50018653. The next prime is 50018681. The reversal of 50018665 is 56681005.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19900521 + 30118144 = 4461^2 + 5488^2 .

It is a cyclic number.

It is not a de Polignac number, because 50018665 - 2¹³ = 50010473 is a prime.

It is a Duffinian 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, 5001862 + ... + 5001871.

It is an arithmetic number, because the mean of its divisors is an integer number (15005601).

Almost surely, 2^50018665 is an apocalyptic number.

It is an amenable number.

50018665 is a deficient number, since it is larger than the sum of its proper divisors (10003739).

50018665 is a wasteful number, since it uses less digits than its factorization.

50018665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003738.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 50018665 is about 7072.3875035238. The cubic root of 50018665 is about 368.4489857929.

The spelling of 50018665 in words is "fifty million, eighteen thousand, six hundred sixty-five".