668926411429 has 12 divisors (see below), whose sum is σ = 711000214884. Its totient is φ = 629214040064.

The previous prime is 668926411409. The next prime is 668926411453. The reversal of 668926411429 is 924114629866.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 194832194404 + 474094217025 = 441398^2 + 688545^2 .

It is not a de Polignac number, because 668926411429 - 2¹¹ = 668926409381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668926411409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166972 + ... + 1168645.

It is an arithmetic number, because the mean of its divisors is an integer number (59250017907).

Almost surely, 2^668926411429 is an apocalyptic number.

It is an amenable number.

668926411429 is a deficient number, since it is larger than the sum of its proper divisors (42073803455).

668926411429 is a wasteful number, since it uses less digits than its factorization.

668926411429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337384 (or 1337367 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 58.

The spelling of 668926411429 in words is "six hundred sixty-eight billion, nine hundred twenty-six million, four hundred eleven thousand, four hundred twenty-nine".