666360426 has 32 divisors (see below), whose sum is σ = 1355447808. Its totient is φ = 218346480.

The previous prime is 666360389. The next prime is 666360427. The reversal of 666360426 is 624063666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (666360427) 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 15 ways as a sum of consecutive naturals, for example, 228091 + ... + 230993.

It is an arithmetic number, because the mean of its divisors is an integer number (42357744).

Almost surely, 2^666360426 is an apocalyptic number.

666360426 is an abundant number, since it is smaller than the sum of its proper divisors (689087382).

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

666360426 is a wasteful number, since it uses less digits than its factorization.

666360426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546.

The product of its (nonzero) digits is 186624, while the sum is 39.

The square root of 666360426 is about 25813.9579685100. The cubic root of 666360426 is about 873.4466813173.

The spelling of 666360426 in words is "six hundred sixty-six million, three hundred sixty thousand, four hundred twenty-six".