66808134 has 12 divisors (see below), whose sum is σ = 144750996. Its totient is φ = 22269372.

The previous prime is 66808109. The next prime is 66808153. The reversal of 66808134 is 43180866.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1855764 + ... + 1855799.

It is an arithmetic number, because the mean of its divisors is an integer number (12062583).

Almost surely, 2^66808134 is an apocalyptic number.

66808134 is an abundant number, since it is smaller than the sum of its proper divisors (77942862).

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

66808134 is a wasteful number, since it uses less digits than its factorization.

66808134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711571 (or 3711568 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 66808134 is about 8173.6242879154. The cubic root of 66808134 is about 405.7667413708.

The spelling of 66808134 in words is "sixty-six million, eight hundred eight thousand, one hundred thirty-four".