669015730 has 8 divisors (see below), whose sum is σ = 1204228332. Its totient is φ = 267606288.

The previous prime is 669015713. The next prime is 669015749. The reversal of 669015730 is 37510966.

It can be written as a sum of positive squares in 2 ways, for example, as 663526081 + 5489649 = 25759^2 + 2343^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 669015730.

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, 33450777 + ... + 33450796.

Almost surely, 2^669015730 is an apocalyptic number.

669015730 is a deficient number, since it is larger than the sum of its proper divisors (535212602).

669015730 is a wasteful number, since it uses less digits than its factorization.

669015730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66901580.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 669015730 is about 25865.3383894354. The cubic root of 669015730 is about 874.6053098833.

The spelling of 669015730 in words is "six hundred sixty-nine million, fifteen thousand, seven hundred thirty".