66064371 has 4 divisors (see below), whose sum is σ = 88085832. Its totient is φ = 44042912.

The previous prime is 66064367. The next prime is 66064381. The reversal of 66064371 is 17346066.

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 66064371 - 2² = 66064367 is a prime.

It is a super-2 number, since 2×66064371² = 8729002231251282, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (66064321) 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, 11010726 + ... + 11010731.

It is an arithmetic number, because the mean of its divisors is an integer number (22021458).

Almost surely, 2^66064371 is an apocalyptic number.

66064371 is a deficient number, since it is larger than the sum of its proper divisors (22021461).

66064371 is a wasteful number, since it uses less digits than its factorization.

66064371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22021460.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 66064371 is about 8127.9992002952. Note that the first 3 decimals coincide. The cubic root of 66064371 is about 404.2553425342.

The spelling of 66064371 in words is "sixty-six million, sixty-four thousand, three hundred seventy-one".