66100118 has 24 divisors (see below), whose sum is σ = 118158264. Its totient is φ = 27636000.

The previous prime is 66100117. The next prime is 66100187. The reversal of 66100118 is 81100166.

It is a happy number.

It is a super-2 number, since 2×66100118² = 8738451199227848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66100093 and 66100102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66100117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4208 + ... + 12243.

It is an arithmetic number, because the mean of its divisors is an integer number (4923261).

Almost surely, 2^66100118 is an apocalyptic number.

66100118 is a deficient number, since it is larger than the sum of its proper divisors (52058146).

66100118 is a wasteful number, since it uses less digits than its factorization.

66100118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16508 (or 16501 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 66100118 is about 8130.1979065703. The cubic root of 66100118 is about 404.3282426964.

The spelling of 66100118 in words is "sixty-six million, one hundred thousand, one hundred eighteen".