666326426 has 24 divisors (see below), whose sum is σ = 1031641920. Its totient is φ = 322623576.

The previous prime is 666326411. The next prime is 666326429. The reversal of 666326426 is 624623666.

It is not an unprimeable number, because it can be changed into a prime (666326429) 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, 3348275 + ... + 3348473.

It is an arithmetic number, because the mean of its divisors is an integer number (42985080).

Almost surely, 2^666326426 is an apocalyptic number.

666326426 is a deficient number, since it is larger than the sum of its proper divisors (365315494).

666326426 is a wasteful number, since it uses less digits than its factorization.

666326426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 427 counting only the distinct ones).

The product of its digits is 373248, while the sum is 41.

The square root of 666326426 is about 25813.2994016650. The cubic root of 666326426 is about 873.4318256470.

The spelling of 666326426 in words is "six hundred sixty-six million, three hundred twenty-six thousand, four hundred twenty-six".