665147240824 has 16 divisors (see below), whose sum is σ = 1360528447320. Its totient is φ = 302339654880.

The previous prime is 665147240803. The next prime is 665147240831. The reversal of 665147240824 is 428042741566.

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, 3779245599 + ... + 3779245774.

Almost surely, 2^665147240824 is an apocalyptic number.

It is an amenable number.

665147240824 is an abundant number, since it is smaller than the sum of its proper divisors (695381206496).

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

665147240824 is a wasteful number, since it uses less digits than its factorization.

665147240824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7558491390 (or 7558491386 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 49.

The spelling of 665147240824 in words is "six hundred sixty-five billion, one hundred forty-seven million, two hundred forty thousand, eight hundred twenty-four".