664711474011451 has 4 divisors (see below), whose sum is σ = 674073607448304. Its totient is φ = 655349340574600.

The previous prime is 664711474011413. The next prime is 664711474011457. The reversal of 664711474011451 is 154110474117466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664711474011451 - 2⁹ = 664711474010939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664711474011457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4681066718320 + ... + 4681066718461.

It is an arithmetic number, because the mean of its divisors is an integer number (168518401862076).

Almost surely, 2^{664711474011451} is an apocalyptic number.

664711474011451 is a deficient number, since it is larger than the sum of its proper divisors (9362133436853).

664711474011451 is an equidigital number, since it uses as much as digits as its factorization.

664711474011451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9362133436852.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 664711474011451 in words is "six hundred sixty-four trillion, seven hundred eleven billion, four hundred seventy-four million, eleven thousand, four hundred fifty-one".