664243123404674 has 16 divisors (see below), whose sum is σ = 1086945451197696. Its totient is φ = 301928092914000.

The previous prime is 664243123404659. The next prime is 664243123404691. The reversal of 664243123404674 is 476404321342466.

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, 18549362 + ... + 40897005.

It is an arithmetic number, because the mean of its divisors is an integer number (67934090699856).

Almost surely, 2^{664243123404674} is an apocalyptic number.

664243123404674 is a deficient number, since it is larger than the sum of its proper divisors (422702327793022).

664243123404674 is a wasteful number, since it uses less digits than its factorization.

664243123404674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59954281.

The product of its (nonzero) digits is 55738368, while the sum is 56.

The spelling of 664243123404674 in words is "six hundred sixty-four trillion, two hundred forty-three billion, one hundred twenty-three million, four hundred four thousand, six hundred seventy-four".