66384814 has 4 divisors (see below), whose sum is σ = 99577224. Its totient is φ = 33192406.

The previous prime is 66384767. The next prime is 66384817. The reversal of 66384814 is 41848366.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66384817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16596202 + ... + 16596205.

It is an arithmetic number, because the mean of its divisors is an integer number (24894306).

Almost surely, 2^66384814 is an apocalyptic number.

66384814 is a deficient number, since it is larger than the sum of its proper divisors (33192410).

66384814 is a wasteful number, since it uses less digits than its factorization.

66384814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33192409.

The product of its digits is 110592, while the sum is 40.

The square root of 66384814 is about 8147.6876474249. The cubic root of 66384814 is about 404.9078975646.

The spelling of 66384814 in words is "sixty-six million, three hundred eighty-four thousand, eight hundred fourteen".