665685622 has 8 divisors (see below), whose sum is σ = 1141175376. Its totient is φ = 285293832.

The previous prime is 665685593. The next prime is 665685637. The reversal of 665685622 is 226586566.

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

It is a congruent 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, 23774473 + ... + 23774500.

It is an arithmetic number, because the mean of its divisors is an integer number (142646922).

Almost surely, 2^665685622 is an apocalyptic number.

665685622 is a deficient number, since it is larger than the sum of its proper divisors (475489754).

665685622 is a wasteful number, since it uses less digits than its factorization.

665685622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47548982.

The product of its digits is 1036800, while the sum is 46.

The square root of 665685622 is about 25800.8841321378. The cubic root of 665685622 is about 873.1517436423.

The spelling of 665685622 in words is "six hundred sixty-five million, six hundred eighty-five thousand, six hundred twenty-two".