66634411 has 4 divisors (see below), whose sum is σ = 67058992. Its totient is φ = 66209832.

The previous prime is 66634397. The next prime is 66634417. The reversal of 66634411 is 11443666.

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 66634411 - 2¹⁵ = 66601643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66634417) 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, 212055 + ... + 212368.

It is an arithmetic number, because the mean of its divisors is an integer number (16764748).

Almost surely, 2^66634411 is an apocalyptic number.

66634411 is a deficient number, since it is larger than the sum of its proper divisors (424581).

66634411 is a wasteful number, since it uses less digits than its factorization.

66634411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424580.

The product of its digits is 10368, while the sum is 31.

The square root of 66634411 is about 8162.9903221797. The cubic root of 66634411 is about 405.4147273285.

The spelling of 66634411 in words is "sixty-six million, six hundred thirty-four thousand, four hundred eleven".