669613616 has 30 divisors (see below), whose sum is σ = 1509194700. Its totient is φ = 286976928.

The previous prime is 669613613. The next prime is 669613619. The reversal of 669613616 is 616316966.

It is an interprime number because it is at equal distance from previous prime (669613613) and next prime (669613619).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (669613613) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 426266 + ... + 427833.

It is an arithmetic number, because the mean of its divisors is an integer number (50306490).

Almost surely, 2^669613616 is an apocalyptic number.

It is an amenable number.

669613616 is an abundant number, since it is smaller than the sum of its proper divisors (839581084).

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

669613616 is a wasteful number, since it uses less digits than its factorization.

669613616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854121 (or 854108 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 669613616 is about 25876.8934766135. The cubic root of 669613616 is about 874.8657714098.

The spelling of 669613616 in words is "six hundred sixty-nine million, six hundred thirteen thousand, six hundred sixteen".