669570290 has 8 divisors (see below), whose sum is σ = 1205226540. Its totient is φ = 267828112.

The previous prime is 669570283. The next prime is 669570311. The reversal of 669570290 is 92075966.

It can be written as a sum of positive squares in 2 ways, for example, as 668170801 + 1399489 = 25849^2 + 1183^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33478505 + ... + 33478524.

Almost surely, 2^669570290 is an apocalyptic number.

669570290 is a deficient number, since it is larger than the sum of its proper divisors (535656250).

669570290 is a wasteful number, since it uses less digits than its factorization.

669570290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66957036.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 669570290 is about 25876.0563069414. The cubic root of 669570290 is about 874.8469021938.

The spelling of 669570290 in words is "six hundred sixty-nine million, five hundred seventy thousand, two hundred ninety".