66750673 has 4 divisors (see below), whose sum is σ = 72818928. Its totient is φ = 60682420.

The previous prime is 66750661. The next prime is 66750683. The reversal of 66750673 is 37605766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66750673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66750613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3034111 + ... + 3034132.

It is an arithmetic number, because the mean of its divisors is an integer number (18204732).

Almost surely, 2^66750673 is an apocalyptic number.

It is an amenable number.

66750673 is a deficient number, since it is larger than the sum of its proper divisors (6068255).

66750673 is a wasteful number, since it uses less digits than its factorization.

66750673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6068254.

The product of its (nonzero) digits is 158760, while the sum is 40.

The square root of 66750673 is about 8170.1085060114. The cubic root of 66750673 is about 405.6503760469.

The spelling of 66750673 in words is "sixty-six million, seven hundred fifty thousand, six hundred seventy-three".