665196745 has 8 divisors (see below), whose sum is σ = 840248640. Its totient is φ = 504149040.

The previous prime is 665196743. The next prime is 665196793. The reversal of 665196745 is 547691566.

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

It is not a de Polignac number, because 665196745 - 2¹ = 665196743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665196743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3500941 + ... + 3501130.

It is an arithmetic number, because the mean of its divisors is an integer number (105031080).

Almost surely, 2^665196745 is an apocalyptic number.

It is an amenable number.

665196745 is a deficient number, since it is larger than the sum of its proper divisors (175051895).

665196745 is a wasteful number, since it uses less digits than its factorization.

665196745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7002095.

The product of its digits is 1360800, while the sum is 49.

The square root of 665196745 is about 25791.4083562724. The cubic root of 665196745 is about 872.9379448514.

The spelling of 665196745 in words is "six hundred sixty-five million, one hundred ninety-six thousand, seven hundred forty-five".