668952029 has 8 divisors (see below), whose sum is σ = 678519072. Its totient is φ = 659421040.

The previous prime is 668951999. The next prime is 668952059. The reversal of 668952029 is 920259866.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (668951999) and next prime (668952059).

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 668952029 - 2²⁴ = 652174813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668952059) 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, 29522 + ... + 47004.

It is an arithmetic number, because the mean of its divisors is an integer number (84814884).

Almost surely, 2^668952029 is an apocalyptic number.

It is an amenable number.

668952029 is a deficient number, since it is larger than the sum of its proper divisors (9567043).

668952029 is a wasteful number, since it uses less digits than its factorization.

668952029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18027.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 668952029 is about 25864.1069631256. The cubic root of 668952029 is about 874.5775501966.

The spelling of 668952029 in words is "six hundred sixty-eight million, nine hundred fifty-two thousand, twenty-nine".