665070607320 has 64 divisors (see below), whose sum is σ = 2280242085120. Its totient is φ = 152016138624.

The previous prime is 665070607213. The next prime is 665070607321. The reversal of 665070607320 is 23706070566.

665070607320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665070607321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395874522 + ... + 395876201.

It is an arithmetic number, because the mean of its divisors is an integer number (35628782580).

Almost surely, 2^665070607320 is an apocalyptic number.

665070607320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665070607320 is an abundant number, since it is smaller than the sum of its proper divisors (1615171477800).

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

665070607320 is a wasteful number, since it uses less digits than its factorization.

665070607320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791750744 (or 791750740 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 42.

Adding to 665070607320 its reverse (23706070566), we get a palindrome (688776677886).

The spelling of 665070607320 in words is "six hundred sixty-five billion, seventy million, six hundred seven thousand, three hundred twenty".