820366057 has 8 divisors (see below), whose sum is σ = 946664576. Its totient is φ = 696343392.

The previous prime is 820366049. The next prime is 820366121. The reversal of 820366057 is 750663028.

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

It is a cyclic number.

It is not a de Polignac number, because 820366057 - 2³ = 820366049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820366037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 568188 + ... + 569629.

It is an arithmetic number, because the mean of its divisors is an integer number (118333072).

Almost surely, 2^820366057 is an apocalyptic number.

It is an amenable number.

820366057 is a deficient number, since it is larger than the sum of its proper divisors (126298519).

820366057 is a wasteful number, since it uses less digits than its factorization.

820366057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137927.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 820366057 is about 28642.0330458576. The cubic root of 820366057 is about 936.1294203546.

The spelling of 820366057 in words is "eight hundred twenty million, three hundred sixty-six thousand, fifty-seven".