66208855 has 8 divisors (see below), whose sum is σ = 79496064. Its totient is φ = 52936800.

The previous prime is 66208837. The next prime is 66208861. The reversal of 66208855 is 55880266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66208855 - 2¹¹ = 66206807 is a prime.

It is a super-2 number, since 2×66208855² = 8767224960822050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11290 + ... + 16120.

It is an arithmetic number, because the mean of its divisors is an integer number (9937008).

Almost surely, 2^66208855 is an apocalyptic number.

66208855 is a deficient number, since it is larger than the sum of its proper divisors (13287209).

66208855 is a wasteful number, since it uses less digits than its factorization.

66208855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7577.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 66208855 is about 8136.8823882369. The cubic root of 66208855 is about 404.5498325878.

The spelling of 66208855 in words is "sixty-six million, two hundred eight thousand, eight hundred fifty-five".