66743075 has 12 divisors (see below), whose sum is σ = 94584720. Its totient is φ = 45766560.

The previous prime is 66743063. The next prime is 66743107. The reversal of 66743075 is 57034766.

It is not a de Polignac number, because 66743075 - 2⁶ = 66743011 is a prime.

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, 190520 + ... + 190869.

It is an arithmetic number, because the mean of its divisors is an integer number (7882060).

Almost surely, 2^66743075 is an apocalyptic number.

66743075 is a deficient number, since it is larger than the sum of its proper divisors (27841645).

66743075 is a wasteful number, since it uses less digits than its factorization.

66743075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381406 (or 381401 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 66743075 is about 8169.6435050741. The cubic root of 66743075 is about 405.6349841995.

The spelling of 66743075 in words is "sixty-six million, seven hundred forty-three thousand, seventy-five".