66614608 has 40 divisors (see below), whose sum is σ = 136459520. Its totient is φ = 31502304.

The previous prime is 66614593. The next prime is 66614609. The reversal of 66614608 is 80641666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66614609) 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, 109441 + ... + 110047.

It is an arithmetic number, because the mean of its divisors is an integer number (3411488).

Almost surely, 2^66614608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66614608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68229760).

66614608 is an abundant number, since it is smaller than the sum of its proper divisors (69844912).

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

66614608 is an equidigital number, since it uses as much as digits as its factorization.

66614608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 66614608 is about 8161.7772574360. Note that the first 3 decimals coincide. The cubic root of 66614608 is about 405.3745617785.

The spelling of 66614608 in words is "sixty-six million, six hundred fourteen thousand, six hundred eight".