82661850 has 48 divisors (see below), whose sum is σ = 227783040. Its totient is φ = 22042800.

The previous prime is 82661849. The next prime is 82661851. The reversal of 82661850 is 5816628.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (82661849) and next prime (82661851).

It is not an unprimeable number, because it can be changed into a prime (82661851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29266 + ... + 31965.

It is an arithmetic number, because the mean of its divisors is an integer number (4745480).

Almost surely, 2^82661850 is an apocalyptic number.

82661850 is an abundant number, since it is smaller than the sum of its proper divisors (145121190).

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

82661850 is a wasteful number, since it uses less digits than its factorization.

82661850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61252 (or 61241 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 82661850 is about 9091.8562461139. The cubic root of 82661850 is about 435.6138776324.

The spelling of 82661850 in words is "eighty-two million, six hundred sixty-one thousand, eight hundred fifty".