668051431425 has 144 divisors (see below), whose sum is σ = 1494640622592. Its totient is φ = 278158233600.

The previous prime is 668051431303. The next prime is 668051431501. The reversal of 668051431425 is 524134150866.

668051431425 is a `hidden beast` number, since 6 + 6 + 80 + 5 + 143 + 1 + 425 = 666.

It is not a de Polignac number, because 668051431425 - 2⁸ = 668051431169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 143 ways as a sum of consecutive naturals, for example, 427597 + ... + 1232453.

It is an arithmetic number, because the mean of its divisors is an integer number (10379448768).

Almost surely, 2^668051431425 is an apocalyptic number.

It is an amenable number.

668051431425 is an abundant number, since it is smaller than the sum of its proper divisors (826589191167).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668051431425 is a wasteful number, since it uses less digits than its factorization.

668051431425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804928 (or 804920 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 668051431425 in words is "six hundred sixty-eight billion, fifty-one million, four hundred thirty-one thousand, four hundred twenty-five".