82666885 has 8 divisors (see below), whose sum is σ = 113371776. Its totient is φ = 56685840.

The previous prime is 82666867. The next prime is 82666931. The reversal of 82666885 is 58866628.

It is a happy number.

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

It is not a de Polignac number, because 82666885 - 2¹⁵ = 82634117 is a prime.

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, 1180921 + ... + 1180990.

It is an arithmetic number, because the mean of its divisors is an integer number (14171472).

Almost surely, 2^82666885 is an apocalyptic number.

It is an amenable number.

82666885 is a deficient number, since it is larger than the sum of its proper divisors (30704891).

82666885 is a wasteful number, since it uses less digits than its factorization.

82666885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361923.

The product of its digits is 1105920, while the sum is 49.

The square root of 82666885 is about 9092.1331380485. The cubic root of 82666885 is about 435.6227219838.

It can be divided in two parts, 8266 and 6885, that added together give a palindrome (15151).

The spelling of 82666885 in words is "eighty-two million, six hundred sixty-six thousand, eight hundred eighty-five".