66908194 has 8 divisors (see below), whose sum is σ = 100690128. Its totient is φ = 33344820.

The previous prime is 66908189. The next prime is 66908201. The reversal of 66908194 is 49180966.

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 66908194.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53872 + ... + 55099.

It is an arithmetic number, because the mean of its divisors is an integer number (12586266).

Almost surely, 2^66908194 is an apocalyptic number.

66908194 is a deficient number, since it is larger than the sum of its proper divisors (33781934).

66908194 is a wasteful number, since it uses less digits than its factorization.

66908194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109280.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 66908194 is about 8179.7429054953. The cubic root of 66908194 is about 405.9692155552.

It can be divided in two parts, 6690 and 8194, that added together give a square (14884 = 122²).

The spelling of 66908194 in words is "sixty-six million, nine hundred eight thousand, one hundred ninety-four".