7661863 has 4 divisors (see below), whose sum is σ = 8358408. Its totient is φ = 6965320.

The previous prime is 7661851. The next prime is 7661881. The reversal of 7661863 is 3681667.

7661863 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7661863 - 2⁵ = 7661831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661803) 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 3 ways as a sum of consecutive naturals, for example, 348256 + ... + 348277.

It is an arithmetic number, because the mean of its divisors is an integer number (2089602).

Almost surely, 2^7661863 is an apocalyptic number.

7661863 is a deficient number, since it is larger than the sum of its proper divisors (696545).

7661863 is a wasteful number, since it uses less digits than its factorization.

7661863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696544.

The product of its digits is 36288, while the sum is 37.

The square root of 7661863 is about 2768.0070447887. The cubic root of 7661863 is about 197.1415321072.

The spelling of 7661863 in words is "seven million, six hundred sixty-one thousand, eight hundred sixty-three".