66612414 has 64 divisors (see below), whose sum is σ = 150232320. Its totient is φ = 19518720.

The previous prime is 66612373. The next prime is 66612419. The reversal of 66612414 is 41421666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66612419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479157 + ... + 479295.

It is an arithmetic number, because the mean of its divisors is an integer number (2347380).

Almost surely, 2^66612414 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66612414, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75116160).

66612414 is an abundant number, since it is smaller than the sum of its proper divisors (83619906).

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

66612414 is a wasteful number, since it uses less digits than its factorization.

66612414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345.

The product of its digits is 6912, while the sum is 30.

The square root of 66612414 is about 8161.6428493288. The cubic root of 66612414 is about 405.3701112955.

The spelling of 66612414 in words is "sixty-six million, six hundred twelve thousand, four hundred fourteen".