664646551095074 has 8 divisors (see below), whose sum is σ = 1015780578088860. Its totient is φ = 326053025065456.

The previous prime is 664646551095067. The next prime is 664646551095091. The reversal of 664646551095074 is 470590155646466.

It can be written as a sum of positive squares in 2 ways, for example, as 652125958077049 + 12520593018025 = 25536757^2 + 3538445^2 .

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

It is a super-4 number, since 4×664646551095074⁴ (a number of 60 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664646551094995 and 664646551095013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3135125240909 + ... + 3135125241120.

Almost surely, 2^{664646551095074} is an apocalyptic number.

664646551095074 is a deficient number, since it is larger than the sum of its proper divisors (351134026993786).

664646551095074 is a wasteful number, since it uses less digits than its factorization.

664646551095074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6270250482084.

The product of its (nonzero) digits is 653184000, while the sum is 68.

The spelling of 664646551095074 in words is "six hundred sixty-four trillion, six hundred forty-six billion, five hundred fifty-one million, ninety-five thousand, seventy-four".