82120766 has 48 divisors (see below), whose sum is σ = 156605904. Its totient is φ = 32006016.

The previous prime is 82120763. The next prime is 82120771. The reversal of 82120766 is 66702128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82120763) 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, 92561 + ... + 93443.

It is an arithmetic number, because the mean of its divisors is an integer number (3262623).

Almost surely, 2^82120766 is an apocalyptic number.

82120766 is a deficient number, since it is larger than the sum of its proper divisors (74485138).

82120766 is a wasteful number, since it uses less digits than its factorization.

82120766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 82120766 is about 9062.0508716294. The cubic root of 82120766 is about 434.6613226799.

The spelling of 82120766 in words is "eighty-two million, one hundred twenty thousand, seven hundred sixty-six".