666442062426 has 32 divisors (see below), whose sum is σ = 1572434731008. Its totient is φ = 184269694320.

The previous prime is 666442062413. The next prime is 666442062439. The reversal of 666442062426 is 624260244666.

666442062426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (666442062413) and next prime (666442062439).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255928830 + ... + 255931433.

It is an arithmetic number, because the mean of its divisors is an integer number (49138585344).

Almost surely, 2^666442062426 is an apocalyptic number.

666442062426 is an abundant number, since it is smaller than the sum of its proper divisors (905992668582).

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

666442062426 is a wasteful number, since it uses less digits than its factorization.

666442062426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511860306.

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 666442062426 in words is "six hundred sixty-six billion, four hundred forty-two million, sixty-two thousand, four hundred twenty-six".