669739983 has 16 divisors (see below), whose sum is σ = 977074176. Its totient is φ = 404691840.

The previous prime is 669739979. The next prime is 669739991. The reversal of 669739983 is 389937966.

It is a happy number.

It is not a de Polignac number, because 669739983 - 2² = 669739979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669732983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18991 + ... + 41232.

It is an arithmetic number, because the mean of its divisors is an integer number (61067136).

Almost surely, 2^669739983 is an apocalyptic number.

669739983 is a deficient number, since it is larger than the sum of its proper divisors (307334193).

669739983 is a wasteful number, since it uses less digits than its factorization.

669739983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60574.

The product of its digits is 13226976, while the sum is 60.

The square root of 669739983 is about 25879.3350571455. The cubic root of 669739983 is about 874.9208017570.

The spelling of 669739983 in words is "six hundred sixty-nine million, seven hundred thirty-nine thousand, nine hundred eighty-three".