666026426 has 32 divisors (see below), whose sum is σ = 1097096448. Its totient is φ = 301371840.

The previous prime is 666026411. The next prime is 666026429. The reversal of 666026426 is 624620666.

It is a self number, because there is not a number n which added to its sum of digits gives 666026426.

It is not an unprimeable number, because it can be changed into a prime (666026429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733865 + ... + 734771.

It is an arithmetic number, because the mean of its divisors is an integer number (34284264).

Almost surely, 2^666026426 is an apocalyptic number.

666026426 is a deficient number, since it is larger than the sum of its proper divisors (431070022).

666026426 is a wasteful number, since it uses less digits than its factorization.

666026426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 666026426 is about 25807.4877893994. The cubic root of 666026426 is about 873.3007242970.

The spelling of 666026426 in words is "six hundred sixty-six million, twenty-six thousand, four hundred twenty-six".