66814254 has 32 divisors (see below), whose sum is σ = 159899040. Its totient is φ = 20558016.

The previous prime is 66814247. The next prime is 66814259. The reversal of 66814254 is 45241866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66814259) 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, 46887 + ... + 48290.

It is an arithmetic number, because the mean of its divisors is an integer number (4996845).

Almost surely, 2^66814254 is an apocalyptic number.

66814254 is an abundant number, since it is smaller than the sum of its proper divisors (93084786).

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

66814254 is a wasteful number, since it uses less digits than its factorization.

66814254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95201 (or 95195 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 66814254 is about 8173.9986542695. The cubic root of 66814254 is about 405.7791311627.

The spelling of 66814254 in words is "sixty-six million, eight hundred fourteen thousand, two hundred fifty-four".