665362564 has 24 divisors (see below), whose sum is σ = 1223676608. Its totient is φ = 316159200.

The previous prime is 665362471. The next prime is 665362589. The reversal of 665362564 is 465263566.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 665362564.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45912 + ... + 58639.

Almost surely, 2^665362564 is an apocalyptic number.

It is an amenable number.

665362564 is a deficient number, since it is larger than the sum of its proper divisors (558314044).

665362564 is a wasteful number, since it uses less digits than its factorization.

665362564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104635 (or 104633 counting only the distinct ones).

The product of its digits is 777600, while the sum is 43.

The square root of 665362564 is about 25794.6227729734. The cubic root of 665362564 is about 873.0104736043.

The spelling of 665362564 in words is "six hundred sixty-five million, three hundred sixty-two thousand, five hundred sixty-four".