66401714 has 16 divisors (see below), whose sum is σ = 102453120. Its totient is φ = 32257440.

The previous prime is 66401693. The next prime is 66401719. The reversal of 66401714 is 41710466.

It is not an unprimeable number, because it can be changed into a prime (66401719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20027 + ... + 23105.

It is an arithmetic number, because the mean of its divisors is an integer number (6403320).

Almost surely, 2^66401714 is an apocalyptic number.

66401714 is a deficient number, since it is larger than the sum of its proper divisors (36051406).

66401714 is a wasteful number, since it uses less digits than its factorization.

66401714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 66401714 is about 8148.7246854953. The cubic root of 66401714 is about 404.9422546334.

The spelling of 66401714 in words is "sixty-six million, four hundred one thousand, seven hundred fourteen".