66859411 has 4 divisors (see below), whose sum is σ = 67019400. Its totient is φ = 66699424.

The previous prime is 66859393. The next prime is 66859439. The reversal of 66859411 is 11495866.

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 66859411 - 2⁵ = 66859379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66859451) 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, 79366 + ... + 80203.

It is an arithmetic number, because the mean of its divisors is an integer number (16754850).

Almost surely, 2^66859411 is an apocalyptic number.

66859411 is a deficient number, since it is larger than the sum of its proper divisors (159989).

66859411 is a wasteful number, since it uses less digits than its factorization.

66859411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159988.

The product of its digits is 51840, while the sum is 40.

The square root of 66859411 is about 8176.7604220743. The cubic root of 66859411 is about 405.8705270381.

The spelling of 66859411 in words is "sixty-six million, eight hundred fifty-nine thousand, four hundred eleven".