66890414 has 16 divisors (see below), whose sum is σ = 104554800. Its totient is φ = 32055744.

The previous prime is 66890407. The next prime is 66890423. The reversal of 66890414 is 41409866.

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, 3914 + ... + 12210.

It is an arithmetic number, because the mean of its divisors is an integer number (6534675).

Almost surely, 2^66890414 is an apocalyptic number.

66890414 is a deficient number, since it is larger than the sum of its proper divisors (37664386).

66890414 is a wasteful number, since it uses less digits than its factorization.

66890414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8467.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 66890414 is about 8178.6560020580. The cubic root of 66890414 is about 405.9332519873.

The spelling of 66890414 in words is "sixty-six million, eight hundred ninety thousand, four hundred fourteen".