66414774 has 32 divisors (see below), whose sum is σ = 135321984. Its totient is φ = 21726720.

The previous prime is 66414769. The next prime is 66414779. The reversal of 66414774 is 47741466.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66414769) and next prime (66414779).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66414779) 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, 95769 + ... + 96459.

It is an arithmetic number, because the mean of its divisors is an integer number (4228812).

Almost surely, 2^66414774 is an apocalyptic number.

66414774 is an abundant number, since it is smaller than the sum of its proper divisors (68907210).

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

66414774 is a wasteful number, since it uses less digits than its factorization.

66414774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972.

The product of its digits is 112896, while the sum is 39.

The square root of 66414774 is about 8149.5259984860. The cubic root of 66414774 is about 404.9688011327.

The spelling of 66414774 in words is "sixty-six million, four hundred fourteen thousand, seven hundred seventy-four".