669331029 has 4 divisors (see below), whose sum is σ = 892441376. Its totient is φ = 446220684.

The previous prime is 669330947. The next prime is 669331043. The reversal of 669331029 is 920133966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 669331029 - 2⁸ = 669330773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669331079) 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 3 ways as a sum of consecutive naturals, for example, 111555169 + ... + 111555174.

It is an arithmetic number, because the mean of its divisors is an integer number (223110344).

Almost surely, 2^669331029 is an apocalyptic number.

It is an amenable number.

669331029 is a deficient number, since it is larger than the sum of its proper divisors (223110347).

669331029 is a wasteful number, since it uses less digits than its factorization.

669331029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223110346.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 669331029 is about 25871.4326816278. The cubic root of 669331029 is about 874.7426852630.

The spelling of 669331029 in words is "six hundred sixty-nine million, three hundred thirty-one thousand, twenty-nine".