663929326079 has 4 divisors (see below), whose sum is σ = 698872974840. Its totient is φ = 628985677320.

The previous prime is 663929326009. The next prime is 663929326153. The reversal of 663929326079 is 970623929366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663929326079 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 (663929326009) 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, 17471824352 + ... + 17471824389.

It is an arithmetic number, because the mean of its divisors is an integer number (174718243710).

Almost surely, 2^663929326079 is an apocalyptic number.

663929326079 is a deficient number, since it is larger than the sum of its proper divisors (34943648761).

663929326079 is a wasteful number, since it uses less digits than its factorization.

663929326079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34943648760.

The product of its (nonzero) digits is 39680928, while the sum is 62.

The spelling of 663929326079 in words is "six hundred sixty-three billion, nine hundred twenty-nine million, three hundred twenty-six thousand, seventy-nine".