7820663 has 4 divisors (see below), whose sum is σ = 8280720. Its totient is φ = 7360608.

The previous prime is 7820639. The next prime is 7820669. The reversal of 7820663 is 3660287.

7820663 is nontrivially palindromic in base 2 and base 16.

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 7820663 - 2⁶ = 7820599 is a prime.

It is a super-2 number, since 2×7820663² = 122325539519138, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7820669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230003 + ... + 230036.

It is an arithmetic number, because the mean of its divisors is an integer number (2070180).

Almost surely, 2^7820663 is an apocalyptic number.

7820663 is a deficient number, since it is larger than the sum of its proper divisors (460057).

7820663 is a wasteful number, since it uses less digits than its factorization.

7820663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460056.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 7820663 is about 2796.5448324674. The cubic root of 7820663 is about 198.4942165323.

The spelling of 7820663 in words is "seven million, eight hundred twenty thousand, six hundred sixty-three".