7491663 has 16 divisors (see below), whose sum is σ = 11235840. Its totient is φ = 4932792.

The previous prime is 7491647. The next prime is 7491667. The reversal of 7491663 is 3661947.

7491663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7491663 - 2⁴ = 7491647 is a prime.

It is a super-2 number, since 2×7491663² = 112250029011138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7491667) 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 15 ways as a sum of consecutive naturals, for example, 570 + ... + 3912.

It is an arithmetic number, because the mean of its divisors is an integer number (702240).

Almost surely, 2^7491663 is an apocalyptic number.

7491663 is a deficient number, since it is larger than the sum of its proper divisors (3744177).

7491663 is a wasteful number, since it uses less digits than its factorization.

7491663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3435 (or 3429 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 7491663 is about 2737.0902433058. The cubic root of 7491663 is about 195.6708257194.

The spelling of 7491663 in words is "seven million, four hundred ninety-one thousand, six hundred sixty-three".