74666944961647 has 2 divisors, whose sum is σ = 74666944961648. Its totient is φ = 74666944961646.

The previous prime is 74666944961641. The next prime is 74666944961723. The reversal of 74666944961647 is 74616944966647.

It is a weak prime.

It is an emirp because it is prime and its reverse (74616944966647) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74666944961647 - 2³ = 74666944961639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74666944961641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37333472480823 + 37333472480824.

It is an arithmetic number, because the mean of its divisors is an integer number (37333472480824).

Almost surely, 2^{74666944961647} is an apocalyptic number.

74666944961647 is a deficient number, since it is larger than the sum of its proper divisors (1).

74666944961647 is an equidigital number, since it uses as much as digits as its factorization.

74666944961647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7900913664, while the sum is 79.

The spelling of 74666944961647 in words is "seventy-four trillion, six hundred sixty-six billion, nine hundred forty-four million, nine hundred sixty-one thousand, six hundred forty-seven".