66838086 has 48 divisors (see below), whose sum is σ = 174220800. Its totient is φ = 18090864.

The previous prime is 66838081. The next prime is 66838087. The reversal of 66838086 is 68083866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66838081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11566 + ... + 16353.

It is an arithmetic number, because the mean of its divisors is an integer number (3629600).

Almost surely, 2^66838086 is an apocalyptic number.

66838086 is an abundant number, since it is smaller than the sum of its proper divisors (107382714).

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

66838086 is a wasteful number, since it uses less digits than its factorization.

66838086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27953 (or 27950 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 66838086 is about 8175.4563175397. The cubic root of 66838086 is about 405.8273712618.

The spelling of 66838086 in words is "sixty-six million, eight hundred thirty-eight thousand, eighty-six".