66814908 has 24 divisors (see below), whose sum is σ = 162680448. Its totient is φ = 21303216.

The previous prime is 66814897. The next prime is 66814921. The reversal of 66814908 is 80941866.

It is a self number, because there is not a number n which added to its sum of digits gives 66814908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120766 + ... + 121317.

It is an arithmetic number, because the mean of its divisors is an integer number (6778352).

Almost surely, 2^66814908 is an apocalyptic number.

It is an amenable number.

66814908 is an abundant number, since it is smaller than the sum of its proper divisors (95865540).

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

66814908 is a wasteful number, since it uses less digits than its factorization.

66814908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242113 (or 242111 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 66814908 is about 8174.0386590718. The cubic root of 66814908 is about 405.7804551252.

It can be divided in two parts, 668 and 14908, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 66814908 in words is "sixty-six million, eight hundred fourteen thousand, nine hundred eight".