666034721623266 has 16 divisors (see below), whose sum is σ = 1348931081769600. Its totient is φ = 219201300787248.

The previous prime is 666034721623247. The next prime is 666034721623351. The reversal of 666034721623266 is 662326127430666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702568271281 + ... + 702568272228.

It is an arithmetic number, because the mean of its divisors is an integer number (84308192610600).

Almost surely, 2^{666034721623266} is an apocalyptic number.

666034721623266 is an abundant number, since it is smaller than the sum of its proper divisors (682896360146334).

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

666034721623266 is a wasteful number, since it uses less digits than its factorization.

666034721623266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405136543593.

The product of its (nonzero) digits is 94058496, while the sum is 60.

The spelling of 666034721623266 in words is "six hundred sixty-six trillion, thirty-four billion, seven hundred twenty-one million, six hundred twenty-three thousand, two hundred sixty-six".