66343518 has 12 divisors (see below), whose sum is σ = 143744328. Its totient is φ = 22114500.

The previous prime is 66343517. The next prime is 66343549. The reversal of 66343518 is 81534366.

66343518 is a `hidden beast` number, since 6 + 634 + 3 + 5 + 18 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66343513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1842858 + ... + 1842893.

It is an arithmetic number, because the mean of its divisors is an integer number (11978694).

Almost surely, 2^66343518 is an apocalyptic number.

66343518 is an abundant number, since it is smaller than the sum of its proper divisors (77400810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66343518 is a wasteful number, since it uses less digits than its factorization.

66343518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3685759 (or 3685756 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 66343518 is about 8145.1530372363. The cubic root of 66343518 is about 404.8239197994.

The spelling of 66343518 in words is "sixty-six million, three hundred forty-three thousand, five hundred eighteen".