66760885 has 8 divisors (see below), whose sum is σ = 80172216. Its totient is φ = 53369280.

The previous prime is 66760861. The next prime is 66760891. The reversal of 66760885 is 58806766.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17114769 + 49646116 = 4137^2 + 7046^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-66760885 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 3987 + ... + 12223.

It is an arithmetic number, because the mean of its divisors is an integer number (10021527).

Almost surely, 2^66760885 is an apocalyptic number.

It is an amenable number.

66760885 is a deficient number, since it is larger than the sum of its proper divisors (13411331).

66760885 is a wasteful number, since it uses less digits than its factorization.

66760885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9863.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 66760885 is about 8170.7334432106. The cubic root of 66760885 is about 405.6710614334.

The spelling of 66760885 in words is "sixty-six million, seven hundred sixty thousand, eight hundred eighty-five".