665315045 has 16 divisors (see below), whose sum is σ = 804114432. Its totient is φ = 528443520.

The previous prime is 665315041. The next prime is 665315107. The reversal of 665315045 is 540513566.

It is not a de Polignac number, because 665315045 - 2² = 665315041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665314996 and 665315014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665315041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502985 + ... + 504305.

It is an arithmetic number, because the mean of its divisors is an integer number (50257152).

Almost surely, 2^665315045 is an apocalyptic number.

It is an amenable number.

665315045 is a deficient number, since it is larger than the sum of its proper divisors (138799387).

665315045 is a wasteful number, since it uses less digits than its factorization.

665315045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 665315045 is about 25793.7016536983. The cubic root of 665315045 is about 872.9896901625.

The spelling of 665315045 in words is "six hundred sixty-five million, three hundred fifteen thousand, forty-five".