669194951 has 8 divisors (see below), whose sum is σ = 679108608. Its totient is φ = 659295000.

The previous prime is 669194941. The next prime is 669194963. The reversal of 669194951 is 159491966.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669194951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 669194951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669194921) 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 7 ways as a sum of consecutive naturals, for example, 136106 + ... + 140936.

It is an arithmetic number, because the mean of its divisors is an integer number (84888576).

Almost surely, 2^669194951 is an apocalyptic number.

669194951 is a deficient number, since it is larger than the sum of its proper divisors (9913657).

669194951 is a wasteful number, since it uses less digits than its factorization.

669194951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6853.

The product of its digits is 524880, while the sum is 50.

The square root of 669194951 is about 25868.8026588012. The cubic root of 669194951 is about 874.6834015416.

The spelling of 669194951 in words is "six hundred sixty-nine million, one hundred ninety-four thousand, nine hundred fifty-one".