66746886 has 32 divisors (see below), whose sum is σ = 141039360. Its totient is φ = 21000096.

The previous prime is 66746881. The next prime is 66746899. The reversal of 66746886 is 68864766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66746881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35215 + ... + 37061.

It is an arithmetic number, because the mean of its divisors is an integer number (4407480).

Almost surely, 2^66746886 is an apocalyptic number.

66746886 is an abundant number, since it is smaller than the sum of its proper divisors (74292474).

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

66746886 is a wasteful number, since it uses less digits than its factorization.

66746886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188.

The product of its digits is 2322432, while the sum is 51.

The square root of 66746886 is about 8169.8767432563. The cubic root of 66746886 is about 405.6427045785.

The spelling of 66746886 in words is "sixty-six million, seven hundred forty-six thousand, eight hundred eighty-six".