66320442874 has 48 divisors (see below), whose sum is σ = 125841333672. Its totient is φ = 26028076032.

The previous prime is 66320442869. The next prime is 66320442899. The reversal of 66320442874 is 47824402366.

It can be written as a sum of positive squares in 4 ways, for example, as 59515017849 + 6805425025 = 243957^2 + 82495^2 .

It is a super-2 number, since 2×66320442874² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 476307 + ... + 599590.

Almost surely, 2^66320442874 is an apocalyptic number.

66320442874 is a deficient number, since it is larger than the sum of its proper divisors (59520890798).

66320442874 is a wasteful number, since it uses less digits than its factorization.

66320442874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075967 (or 1075960 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 46.

The spelling of 66320442874 in words is "sixty-six billion, three hundred twenty million, four hundred forty-two thousand, eight hundred seventy-four".