626689066421 has 8 divisors (see below), whose sum is σ = 700335453888. Its totient is φ = 555821788000.

The previous prime is 626689066391. The next prime is 626689066483. The reversal of 626689066421 is 124660986626.

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 626689066421 - 2²² = 626684872117 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 (626689006421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694776785 + ... + 694777686.

It is an arithmetic number, because the mean of its divisors is an integer number (87541931736).

Almost surely, 2^626689066421 is an apocalyptic number.

It is an amenable number.

626689066421 is a deficient number, since it is larger than the sum of its proper divisors (73646387467).

626689066421 is a wasteful number, since it uses less digits than its factorization.

626689066421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389554523.

The product of its (nonzero) digits is 8957952, while the sum is 56.

The spelling of 626689066421 in words is "six hundred twenty-six billion, six hundred eighty-nine million, sixty-six thousand, four hundred twenty-one".