8422661 has 8 divisors (see below), whose sum is σ = 9109464. Its totient is φ = 7741440.

The previous prime is 8422649. The next prime is 8422691. The reversal of 8422661 is 1662248.

It can be written as a sum of positive squares in 4 ways, for example, as 185761 + 8236900 = 431^2 + 2870^2 .

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 8422661 - 2⁶ = 8422597 is a prime.

It is a d-powerful number, because it can be written as 8 + 4⁵ + 2¹⁵ + 2²³ + 6² + 6³ + 1 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8422691) 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, 2081 + ... + 4601.

It is an arithmetic number, because the mean of its divisors is an integer number (1138683).

Almost surely, 2^8422661 is an apocalyptic number.

It is an amenable number.

8422661 is a deficient number, since it is larger than the sum of its proper divisors (686803).

8422661 is a wasteful number, since it uses less digits than its factorization.

8422661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791.

The product of its digits is 4608, while the sum is 29.

The square root of 8422661 is about 2902.1821100682. The cubic root of 8422661 is about 203.4619053066.

The spelling of 8422661 in words is "eight million, four hundred twenty-two thousand, six hundred sixty-one".