66208371 has 4 divisors (see below), whose sum is σ = 88277832. Its totient is φ = 44138912.

The previous prime is 66208367. The next prime is 66208379. The reversal of 66208371 is 17380266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66208371 - 2² = 66208367 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66208379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11034726 + ... + 11034731.

It is an arithmetic number, because the mean of its divisors is an integer number (22069458).

Almost surely, 2^66208371 is an apocalyptic number.

66208371 is a deficient number, since it is larger than the sum of its proper divisors (22069461).

66208371 is a wasteful number, since it uses less digits than its factorization.

66208371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22069460.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 66208371 is about 8136.8526470620. The cubic root of 66208371 is about 404.5488468052.

The spelling of 66208371 in words is "sixty-six million, two hundred eight thousand, three hundred seventy-one".