666605444414 has 32 divisors (see below), whose sum is σ = 1256840395776. Its totient is φ = 258101146080.

The previous prime is 666605444413. The next prime is 666605444429. The reversal of 666605444414 is 414444506666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666605444413) 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, 38955992 + ... + 38973099.

It is an arithmetic number, because the mean of its divisors is an integer number (39276262368).

Almost surely, 2^666605444414 is an apocalyptic number.

666605444414 is a deficient number, since it is larger than the sum of its proper divisors (590234951362).

666605444414 is a wasteful number, since it uses less digits than its factorization.

666605444414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77929160.

The product of its (nonzero) digits is 6635520, while the sum is 50.

The spelling of 666605444414 in words is "six hundred sixty-six billion, six hundred five million, four hundred forty-four thousand, four hundred fourteen".