665702496 has 96 divisors (see below), whose sum is σ = 1965237120. Its totient is φ = 219203712.

The previous prime is 665702459. The next prime is 665702503. The reversal of 665702496 is 694207566.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67071 + ... + 76353.

It is an arithmetic number, because the mean of its divisors is an integer number (20471220).

Almost surely, 2^665702496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665702496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982618560).

665702496 is an abundant number, since it is smaller than the sum of its proper divisors (1299534624).

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

665702496 is a wasteful number, since it uses less digits than its factorization.

665702496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9385 (or 9371 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 665702496 is about 25801.2111343634. The cubic root of 665702496 is about 873.1591212179.

The spelling of 665702496 in words is "six hundred sixty-five million, seven hundred two thousand, four hundred ninety-six".