66403265074 has 4 divisors (see below), whose sum is σ = 99604897614. Its totient is φ = 33201632536.

The previous prime is 66403265059. The next prime is 66403265083. The reversal of 66403265074 is 47056230466.

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

It can be written as a sum of positive squares in only one way, i.e., 48099069225 + 18304195849 = 219315^2 + 135293^2 .

It is a super-2 number, since 2×66403265074² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66403265074.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16600816267 + ... + 16600816270.

Almost surely, 2^66403265074 is an apocalyptic number.

66403265074 is a deficient number, since it is larger than the sum of its proper divisors (33201632540).

66403265074 is a wasteful number, since it uses less digits than its factorization.

66403265074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33201632539.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 66403265074 in words is "sixty-six billion, four hundred three million, two hundred sixty-five thousand, seventy-four".