669268730 has 72 divisors (see below), whose sum is σ = 1378005372. Its totient is φ = 233895168.

The previous prime is 669268729. The next prime is 669268753. The reversal of 669268730 is 37862966.

It can be written as a sum of positive squares in 6 ways, for example, as 29735209 + 639533521 = 5453^2 + 25289^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 609542 + ... + 610638.

Almost surely, 2^669268730 is an apocalyptic number.

669268730 is an abundant number, since it is smaller than the sum of its proper divisors (708736642).

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

669268730 is a wasteful number, since it uses less digits than its factorization.

669268730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 669268730 is about 25870.2286422057. The cubic root of 669268730 is about 874.7155450872.

The spelling of 669268730 in words is "six hundred sixty-nine million, two hundred sixty-eight thousand, seven hundred thirty".