666266442 has 16 divisors (see below), whose sum is σ = 1332981792. Its totient is φ = 222014000.

The previous prime is 666266429. The next prime is 666266453. The reversal of 666266442 is 244662666.

It is a junction number, because it is equal to n+sod(n) for n = 666266394 and 666266403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2428 + ... + 36584.

It is an arithmetic number, because the mean of its divisors is an integer number (83311362).

Almost surely, 2^666266442 is an apocalyptic number.

666266442 is an abundant number, since it is smaller than the sum of its proper divisors (666715350).

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

666266442 is a wasteful number, since it uses less digits than its factorization.

666266442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37413.

The product of its digits is 497664, while the sum is 42.

The square root of 666266442 is about 25812.1374938226. The cubic root of 666266442 is about 873.4056155170.

The spelling of 666266442 in words is "six hundred sixty-six million, two hundred sixty-six thousand, four hundred forty-two".