66969886 has 8 divisors (see below), whose sum is σ = 100494504. Its totient is φ = 33471720.

The previous prime is 66969871. The next prime is 66969893. The reversal of 66969886 is 68896966.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66969886.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1921 + ... + 11731.

It is an arithmetic number, because the mean of its divisors is an integer number (12561813).

Almost surely, 2^66969886 is an apocalyptic number.

66969886 is a deficient number, since it is larger than the sum of its proper divisors (33524618).

66969886 is a wasteful number, since it uses less digits than its factorization.

66969886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13226.

The product of its digits is 6718464, while the sum is 58.

The square root of 66969886 is about 8183.5130598051. The cubic root of 66969886 is about 406.0939504483.

The spelling of 66969886 in words is "sixty-six million, nine hundred sixty-nine thousand, eight hundred eighty-six".