66760705 has 16 divisors (see below), whose sum is σ = 87562944. Its totient is φ = 48460480.

The previous prime is 66760703. The next prime is 66760721. The reversal of 66760705 is 50706766.

It is not a de Polignac number, because 66760705 - 2¹ = 66760703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66760703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43074 + ... + 44596.

It is an arithmetic number, because the mean of its divisors is an integer number (5472684).

Almost surely, 2^66760705 is an apocalyptic number.

It is an amenable number.

66760705 is a deficient number, since it is larger than the sum of its proper divisors (20802239).

66760705 is a wasteful number, since it uses less digits than its factorization.

66760705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 66760705 is about 8170.7224282801. The cubic root of 66760705 is about 405.6706968443.

The spelling of 66760705 in words is "sixty-six million, seven hundred sixty thousand, seven hundred five".