66802745 has 8 divisors (see below), whose sum is σ = 81869184. Its totient is φ = 52304944.

The previous prime is 66802733. The next prime is 66802759. The reversal of 66802745 is 54720866.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66802745 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66802699 and 66802708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141899 + ... + 142368.

It is an arithmetic number, because the mean of its divisors is an integer number (10233648).

Almost surely, 2^66802745 is an apocalyptic number.

It is an amenable number.

66802745 is a deficient number, since it is larger than the sum of its proper divisors (15066439).

66802745 is a wasteful number, since it uses less digits than its factorization.

66802745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284319.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 66802745 is about 8173.2946233450. The cubic root of 66802745 is about 405.7558308443.

The spelling of 66802745 in words is "sixty-six million, eight hundred two thousand, seven hundred forty-five".