669929943 has 8 divisors (see below), whose sum is σ = 905821056. Its totient is φ = 440329400.

The previous prime is 669929941. The next prime is 669929951. The reversal of 669929943 is 349929966.

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

It is a cyclic number.

It is not a de Polignac number, because 669929943 - 2¹ = 669929941 is a prime.

It is a super-2 number, since 2×669929943² = 897612257055966498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669929941) 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 7 ways as a sum of consecutive naturals, for example, 1572393 + ... + 1572818.

It is an arithmetic number, because the mean of its divisors is an integer number (113227632).

Almost surely, 2^669929943 is an apocalyptic number.

669929943 is a deficient number, since it is larger than the sum of its proper divisors (235891113).

669929943 is a wasteful number, since it uses less digits than its factorization.

669929943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145285.

The product of its digits is 5668704, while the sum is 57.

The square root of 669929943 is about 25883.0049066950. The cubic root of 669929943 is about 875.0035125845.

The spelling of 669929943 in words is "six hundred sixty-nine million, nine hundred twenty-nine thousand, nine hundred forty-three".