665824745 has 8 divisors (see below), whose sum is σ = 799679040. Its totient is φ = 532200240.

The previous prime is 665824729. The next prime is 665824759. The reversal of 665824745 is 547428566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665824745 - 2⁴ = 665824729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665824745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51005 + ... + 62714.

It is an arithmetic number, because the mean of its divisors is an integer number (99959880).

Almost surely, 2^665824745 is an apocalyptic number.

It is an amenable number.

665824745 is a deficient number, since it is larger than the sum of its proper divisors (133854295).

665824745 is a wasteful number, since it uses less digits than its factorization.

665824745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114895.

The product of its digits is 1612800, while the sum is 47.

The square root of 665824745 is about 25803.5800810663. The cubic root of 665824745 is about 873.2125666617.

The spelling of 665824745 in words is "six hundred sixty-five million, eight hundred twenty-four thousand, seven hundred forty-five".