816632705 has 8 divisors (see below), whose sum is σ = 1119953472. Its totient is φ = 559976688.

The previous prime is 816632701. The next prime is 816632731. The reversal of 816632705 is 507236618.

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 816632705 - 2² = 816632701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816632701) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11666147 + ... + 11666216.

It is an arithmetic number, because the mean of its divisors is an integer number (139994184).

Almost surely, 2^816632705 is an apocalyptic number.

It is an amenable number.

816632705 is a deficient number, since it is larger than the sum of its proper divisors (303320767).

816632705 is a wasteful number, since it uses less digits than its factorization.

816632705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23332375.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 816632705 is about 28576.7861209059. The cubic root of 816632705 is about 934.7072033526.

The spelling of 816632705 in words is "eight hundred sixteen million, six hundred thirty-two thousand, seven hundred five".