820266662 has 24 divisors (see below), whose sum is σ = 1263191256. Its totient is φ = 399396096.

The previous prime is 820266649. The next prime is 820266691. The reversal of 820266662 is 266662028.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1421318 + ... + 1421894.

It is an arithmetic number, because the mean of its divisors is an integer number (52632969).

Almost surely, 2^820266662 is an apocalyptic number.

820266662 is a deficient number, since it is larger than the sum of its proper divisors (442924594).

820266662 is a wasteful number, since it uses less digits than its factorization.

820266662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 820266662 is about 28640.2978685627. The cubic root of 820266662 is about 936.0916118905.

It can be divided in two parts, 82026 and 6662, that added together give a palindrome (88688).

The spelling of 820266662 in words is "eight hundred twenty million, two hundred sixty-six thousand, six hundred sixty-two".