66677814 has 48 divisors (see below), whose sum is σ = 165564672. Its totient is φ = 18998064.

The previous prime is 66677813. The next prime is 66677827. The reversal of 66677814 is 41877666.

It is a self number, because there is not a number n which added to its sum of digits gives 66677814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66677813) 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, 80607 + ... + 81429.

It is an arithmetic number, because the mean of its divisors is an integer number (3449264).

Almost surely, 2^66677814 is an apocalyptic number.

66677814 is an abundant number, since it is smaller than the sum of its proper divisors (98886858).

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

66677814 is a wasteful number, since it uses less digits than its factorization.

66677814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481 (or 1478 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 66677814 is about 8165.6484127104. The cubic root of 66677814 is about 405.5027318897.

The spelling of 66677814 in words is "sixty-six million, six hundred seventy-seven thousand, eight hundred fourteen".