66378614 has 16 divisors (see below), whose sum is σ = 102221136. Its totient is φ = 32316000.

The previous prime is 66378607. The next prime is 66378623. The reversal of 66378614 is 41687366.

It is a super-2 number, since 2×66378614² = 8812240793121992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9629 + ... + 15015.

It is an arithmetic number, because the mean of its divisors is an integer number (6388821).

Almost surely, 2^66378614 is an apocalyptic number.

66378614 is a deficient number, since it is larger than the sum of its proper divisors (35842522).

66378614 is a wasteful number, since it uses less digits than its factorization.

66378614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551.

The product of its digits is 145152, while the sum is 41.

The square root of 66378614 is about 8147.3071624924. The cubic root of 66378614 is about 404.8952917342.

It can be divided in two parts, 6637 and 8614, that added together give a palindrome (15251).

The spelling of 66378614 in words is "sixty-six million, three hundred seventy-eight thousand, six hundred fourteen".