820352665 has 8 divisors (see below), whose sum is σ = 1073916288. Its totient is φ = 596620080.

The previous prime is 820352657. The next prime is 820352671. The reversal of 820352665 is 566253028.

It is a happy number.

820352665 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 not a de Polignac number, because 820352665 - 2³ = 820352657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7457697 + ... + 7457806.

It is an arithmetic number, because the mean of its divisors is an integer number (134239536).

Almost surely, 2^820352665 is an apocalyptic number.

It is an amenable number.

820352665 is a deficient number, since it is larger than the sum of its proper divisors (253563623).

820352665 is a wasteful number, since it uses less digits than its factorization.

820352665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14915519.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 820352665 is about 28641.7992626162. The cubic root of 820352665 is about 936.1243264036.

The spelling of 820352665 in words is "eight hundred twenty million, three hundred fifty-two thousand, six hundred sixty-five".