669029029 has 8 divisors (see below), whose sum is σ = 686242040. Its totient is φ = 652017600.

The previous prime is 669029027. The next prime is 669029047. The reversal of 669029029 is 920920966.

It can be written as a sum of positive squares in 4 ways, for example, as 122544900 + 546484129 = 11070^2 + 23377^2 .

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 669029029 - 2¹ = 669029027 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 (669029027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43662 + ... + 56959.

It is an arithmetic number, because the mean of its divisors is an integer number (85780255).

Almost surely, 2^669029029 is an apocalyptic number.

It is an amenable number.

669029029 is a deficient number, since it is larger than the sum of its proper divisors (17213011).

669029029 is a wasteful number, since it uses less digits than its factorization.

669029029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100791.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 669029029 is about 25865.5954696581. The cubic root of 669029029 is about 874.6111051127.

The spelling of 669029029 in words is "six hundred sixty-nine million, twenty-nine thousand, twenty-nine".