66397894 has 8 divisors (see below), whose sum is σ = 104838840. Its totient is φ = 31451616.

The previous prime is 66397883. The next prime is 66397921. The reversal of 66397894 is 49879366.

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

It is a congruent number.

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, 873619 + ... + 873694.

It is an arithmetic number, because the mean of its divisors is an integer number (13104855).

Almost surely, 2^66397894 is an apocalyptic number.

66397894 is a deficient number, since it is larger than the sum of its proper divisors (38440946).

66397894 is a wasteful number, since it uses less digits than its factorization.

66397894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747334.

The product of its digits is 1959552, while the sum is 52.

The square root of 66397894 is about 8148.4902896181. The cubic root of 66397894 is about 404.9344892261.

The spelling of 66397894 in words is "sixty-six million, three hundred ninety-seven thousand, eight hundred ninety-four".