665752984 has 16 divisors (see below), whose sum is σ = 1344309120. Its totient is φ = 307270560.

The previous prime is 665752973. The next prime is 665753003. The reversal of 665752984 is 489257566.

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 3200632 + ... + 3200839.

It is an arithmetic number, because the mean of its divisors is an integer number (84019320).

Almost surely, 2^665752984 is an apocalyptic number.

It is an amenable number.

665752984 is an abundant number, since it is smaller than the sum of its proper divisors (678556136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665752984 is a wasteful number, since it uses less digits than its factorization.

665752984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6401490 (or 6401486 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 52.

The square root of 665752984 is about 25802.1895194962. The cubic root of 665752984 is about 873.1811946133.

The spelling of 665752984 in words is "six hundred sixty-five million, seven hundred fifty-two thousand, nine hundred eighty-four".