669496690 has 8 divisors (see below), whose sum is σ = 1205094060. Its totient is φ = 267798672.

The previous prime is 669496687. The next prime is 669496691. The reversal of 669496690 is 96694966.

It can be written as a sum of positive squares in 2 ways, for example, as 576432081 + 93064609 = 24009^2 + 9647^2 .

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

It is a super-2 number, since 2×669496690² = 896451635841912200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (669496691) 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 3 ways as a sum of consecutive naturals, for example, 33474825 + ... + 33474844.

Almost surely, 2^669496690 is an apocalyptic number.

669496690 is a deficient number, since it is larger than the sum of its proper divisors (535597370).

669496690 is a wasteful number, since it uses less digits than its factorization.

669496690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66949676.

The product of its (nonzero) digits is 3779136, while the sum is 55.

The square root of 669496690 is about 25874.6341036931. The cubic root of 669496690 is about 874.8148462656.

The spelling of 669496690 in words is "six hundred sixty-nine million, four hundred ninety-six thousand, six hundred ninety".