66075007450 has 24 divisors (see below), whose sum is σ = 122909393340. Its totient is φ = 26427878400.

The previous prime is 66075007393. The next prime is 66075007469. The reversal of 66075007450 is 5470057066.

It is a happy number.

66075007450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 27948149329 + 38126858121 = 167177^2 + 195261^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 673530 + ... + 765370.

Almost surely, 2^66075007450 is an apocalyptic number.

66075007450 is a deficient number, since it is larger than the sum of its proper divisors (56834385890).

66075007450 is a wasteful number, since it uses less digits than its factorization.

66075007450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106242 (or 106237 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 66075007450 in words is "sixty-six billion, seventy-five million, seven thousand, four hundred fifty".