7868661 has 8 divisors (see below), whose sum is σ = 10550880. Its totient is φ = 5216112.

The previous prime is 7868647. The next prime is 7868677. The reversal of 7868661 is 1668687.

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

It is not a de Polignac number, because 7868661 - 2⁵ = 7868629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7868621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6790 + ... + 7863.

It is an arithmetic number, because the mean of its divisors is an integer number (1318860).

Almost surely, 2^7868661 is an apocalyptic number.

It is an amenable number.

7868661 is a deficient number, since it is larger than the sum of its proper divisors (2682219).

7868661 is a wasteful number, since it uses less digits than its factorization.

7868661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14835.

The product of its digits is 96768, while the sum is 42.

The square root of 7868661 is about 2805.1133666930. The cubic root of 7868661 is about 198.8994635387.

The spelling of 7868661 in words is "seven million, eight hundred sixty-eight thousand, six hundred sixty-one".