82666855 has 8 divisors (see below), whose sum is σ = 101507472. Its totient is φ = 64595328.

The previous prime is 82666823. The next prime is 82666861. The reversal of 82666855 is 55866628.

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

It is a cyclic number.

It is not a de Polignac number, because 82666855 - 2⁵ = 82666823 is a prime.

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, 192034 + ... + 192463.

It is an arithmetic number, because the mean of its divisors is an integer number (12688434).

Almost surely, 2^82666855 is an apocalyptic number.

82666855 is a deficient number, since it is larger than the sum of its proper divisors (18840617).

82666855 is a wasteful number, since it uses less digits than its factorization.

82666855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384545.

The product of its digits is 691200, while the sum is 46.

The square root of 82666855 is about 9092.1314882705. The cubic root of 82666855 is about 435.6226692876.

It can be divided in two parts, 82666 and 855, that added together give a 4-th power (83521 = 17⁴).

The spelling of 82666855 in words is "eighty-two million, six hundred sixty-six thousand, eight hundred fifty-five".