660529997929 has 4 divisors (see below), whose sum is σ = 660644222976. Its totient is φ = 660415772884.

The previous prime is 660529997807. The next prime is 660529997947. The reversal of 660529997929 is 929799925066.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660529997929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660529997629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57103849 + ... + 57115414.

It is an arithmetic number, because the mean of its divisors is an integer number (165161055744).

Almost surely, 2^660529997929 is an apocalyptic number.

It is an amenable number.

660529997929 is a deficient number, since it is larger than the sum of its proper divisors (114225047).

660529997929 is a wasteful number, since it uses less digits than its factorization.

660529997929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114225046.

The product of its (nonzero) digits is 297606960, while the sum is 73.

The spelling of 660529997929 in words is "six hundred sixty billion, five hundred twenty-nine million, nine hundred ninety-seven thousand, nine hundred twenty-nine".