820065674 has 8 divisors (see below), whose sum is σ = 1230435360. Its totient is φ = 409920556.

The previous prime is 820065629. The next prime is 820065731. The reversal of 820065674 is 476560028.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 46694 + ... + 61809.

It is an arithmetic number, because the mean of its divisors is an integer number (153804420).

Almost surely, 2^820065674 is an apocalyptic number.

820065674 is a deficient number, since it is larger than the sum of its proper divisors (410369686).

820065674 is a wasteful number, since it uses less digits than its factorization.

820065674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112284.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 820065674 is about 28636.7888213745. The cubic root of 820065674 is about 936.0151495405.

The spelling of 820065674 in words is "eight hundred twenty million, sixty-five thousand, six hundred seventy-four".