665740418 has 8 divisors (see below), whose sum is σ = 1141269312. Its totient is φ = 285317316.

The previous prime is 665740393. The next prime is 665740441. The reversal of 665740418 is 814047566.

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, 23776430 + ... + 23776457.

It is an arithmetic number, because the mean of its divisors is an integer number (142658664).

Almost surely, 2^665740418 is an apocalyptic number.

665740418 is a deficient number, since it is larger than the sum of its proper divisors (475528894).

665740418 is a wasteful number, since it uses less digits than its factorization.

665740418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47552896.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 665740418 is about 25801.9460118806. The cubic root of 665740418 is about 873.1757008520.

The spelling of 665740418 in words is "six hundred sixty-five million, seven hundred forty thousand, four hundred eighteen".