996655 has 8 divisors (see below), whose sum is σ = 1304784. Its totient is φ = 724800.

The previous prime is 996649. The next prime is 996689. The reversal of 996655 is 556699.

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

It is not a de Polignac number, because 996655 - 2³ = 996647 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 9006 + ... + 9115.

It is an arithmetic number, because the mean of its divisors is an integer number (163098).

2⁹⁹⁶⁶⁵⁵ is an apocalyptic number.

996655 is a deficient number, since it is larger than the sum of its proper divisors (308129).

996655 is a wasteful number, since it uses less digits than its factorization.

996655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18137.

The product of its digits is 72900, while the sum is 40.

The square root of 996655 is about 998.3260990278. The cubic root of 996655 is about 99.8883754460. Note that the first 3 decimals are identical.

The spelling of 996655 in words is "nine hundred ninety-six thousand, six hundred fifty-five".