66740074075 has 24 divisors (see below), whose sum is σ = 84600920016. Its totient is φ = 52213008000.

The previous prime is 66740074069. The next prime is 66740074081. The reversal of 66740074075 is 57047004766.

66740074075 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66740074069) and next prime (66740074081).

It is not a de Polignac number, because 66740074075 - 2⁵ = 66740074043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137340 + ... + 390310.

It is an arithmetic number, because the mean of its divisors is an integer number (3525038334).

Almost surely, 2^66740074075 is an apocalyptic number.

66740074075 is a deficient number, since it is larger than the sum of its proper divisors (17860845941).

66740074075 is a wasteful number, since it uses less digits than its factorization.

66740074075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253215 (or 253210 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 46.

The spelling of 66740074075 in words is "sixty-six billion, seven hundred forty million, seventy-four thousand, seventy-five".