66418086 has 32 divisors (see below), whose sum is σ = 153957888. Its totient is φ = 18708480.

The previous prime is 66418069. The next prime is 66418087. The reversal of 66418086 is 68081466.

It is a super-2 number, since 2×66418086² = 8822724295806792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66418087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8155 + ... + 14118.

It is an arithmetic number, because the mean of its divisors is an integer number (4811184).

Almost surely, 2^66418086 is an apocalyptic number.

66418086 is an abundant number, since it is smaller than the sum of its proper divisors (87539802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66418086 is a wasteful number, since it uses less digits than its factorization.

66418086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22356.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 66418086 is about 8149.7291979550. The cubic root of 66418086 is about 404.9755327392.

The spelling of 66418086 in words is "sixty-six million, four hundred eighteen thousand, eighty-six".