666206664262 has 16 divisors (see below), whose sum is σ = 1000895155200. Its totient is φ = 332575173000.

The previous prime is 666206664239. The next prime is 666206664269. The reversal of 666206664262 is 262466602666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666206664269) 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 7 ways as a sum of consecutive naturals, for example, 6072289 + ... + 6181027.

It is an arithmetic number, because the mean of its divisors is an integer number (62555947200).

Almost surely, 2^666206664262 is an apocalyptic number.

666206664262 is a deficient number, since it is larger than the sum of its proper divisors (334688490938).

666206664262 is a wasteful number, since it uses less digits than its factorization.

666206664262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113571.

The product of its (nonzero) digits is 8957952, while the sum is 52.

The spelling of 666206664262 in words is "six hundred sixty-six billion, two hundred six million, six hundred sixty-four thousand, two hundred sixty-two".