666441212050451 has 8 divisors (see below), whose sum is σ = 673757346868704. Its totient is φ = 659134171249920.

The previous prime is 666441212050423. The next prime is 666441212050511. The reversal of 666441212050451 is 154050212144666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666441212050451 - 2¹⁸ = 666441211788307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666441212050396 and 666441212050405.

It is not an unprimeable number, because it can be changed into a prime (666441212050351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2273357060 + ... + 2273650193.

It is an arithmetic number, because the mean of its divisors is an integer number (84219668358588).

Almost surely, 2^{666441212050451} is an apocalyptic number.

666441212050451 is a deficient number, since it is larger than the sum of its proper divisors (7316134818253).

666441212050451 is a wasteful number, since it uses less digits than its factorization.

666441212050451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4547008861.

The product of its (nonzero) digits is 1382400, while the sum is 47.

The spelling of 666441212050451 in words is "six hundred sixty-six trillion, four hundred forty-one billion, two hundred twelve million, fifty thousand, four hundred fifty-one".