66408614 has 4 divisors (see below), whose sum is σ = 99612924. Its totient is φ = 33204306.

The previous prime is 66408607. The next prime is 66408619. The reversal of 66408614 is 41680466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41680466 = 2 ⋅20840233.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66408619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16602152 + ... + 16602155.

It is an arithmetic number, because the mean of its divisors is an integer number (24903231).

Almost surely, 2^66408614 is an apocalyptic number.

66408614 is a deficient number, since it is larger than the sum of its proper divisors (33204310).

66408614 is a wasteful number, since it uses less digits than its factorization.

66408614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33204309.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 66408614 is about 8149.1480536311. The cubic root of 66408614 is about 404.9562803998.

The spelling of 66408614 in words is "sixty-six million, four hundred eight thousand, six hundred fourteen".