820574866 has 8 divisors (see below), whose sum is σ = 1233719424. Its totient is φ = 409335060.

The previous prime is 820574857. The next prime is 820574879. The reversal of 820574866 is 668475028.

820574866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×820574866² = 1346686221421835912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475110 + ... + 476833.

It is an arithmetic number, because the mean of its divisors is an integer number (154214928).

Almost surely, 2^820574866 is an apocalyptic number.

820574866 is a deficient number, since it is larger than the sum of its proper divisors (413144558).

820574866 is a wasteful number, since it uses less digits than its factorization.

820574866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952376.

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 820574866 is about 28645.6779636999. The cubic root of 820574866 is about 936.2088384242.

The spelling of 820574866 in words is "eight hundred twenty million, five hundred seventy-four thousand, eight hundred sixty-six".