8321665 has 8 divisors (see below), whose sum is σ = 10893888. Its totient is φ = 6052080.

The previous prime is 8321657. The next prime is 8321683. The reversal of 8321665 is 5661238.

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

It is not a de Polignac number, because 8321665 - 2³ = 8321657 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, 75597 + ... + 75706.

It is an arithmetic number, because the mean of its divisors is an integer number (1361736).

Almost surely, 2^8321665 is an apocalyptic number.

It is an amenable number.

8321665 is a deficient number, since it is larger than the sum of its proper divisors (2572223).

8321665 is a wasteful number, since it uses less digits than its factorization.

8321665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151319.

The product of its digits is 8640, while the sum is 31.

The square root of 8321665 is about 2884.7296233789. The cubic root of 8321665 is about 202.6453967728.

It can be divided in two parts, 832 and 1665, that multiplied together give a triangular number (1385280 = T₁₆₆₄).

The spelling of 8321665 in words is "eight million, three hundred twenty-one thousand, six hundred sixty-five".