66849718 has 16 divisors (see below), whose sum is σ = 108153360. Its totient is φ = 30806496.

The previous prime is 66849709. The next prime is 66849737. The reversal of 66849718 is 81794866.

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, 19948 + ... + 23056.

It is an arithmetic number, because the mean of its divisors is an integer number (6759585).

Almost surely, 2^66849718 is an apocalyptic number.

66849718 is a deficient number, since it is larger than the sum of its proper divisors (41303642).

66849718 is a wasteful number, since it uses less digits than its factorization.

66849718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951.

The product of its digits is 580608, while the sum is 49.

The square root of 66849718 is about 8176.1676841904. The cubic root of 66849718 is about 405.8509122818.

The spelling of 66849718 in words is "sixty-six million, eight hundred forty-nine thousand, seven hundred eighteen".