7491668 has 12 divisors (see below), whose sum is σ = 13129620. Its totient is φ = 3740352.

The previous prime is 7491667. The next prime is 7491689. The reversal of 7491668 is 8661947.

It can be written as a sum of positive squares in 2 ways, for example, as 6822544 + 669124 = 2612^2 + 818^2 .

It is a super-2 number, since 2×7491668² = 112250178844448, 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4430 + ... + 5882.

It is an arithmetic number, because the mean of its divisors is an integer number (1094135).

Almost surely, 2^7491668 is an apocalyptic number.

It is an amenable number.

7491668 is a deficient number, since it is larger than the sum of its proper divisors (5637952).

7491668 is a wasteful number, since it uses less digits than its factorization.

7491668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746 (or 2744 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 7491668 is about 2737.0911566844. The cubic root of 7491668 is about 195.6708692502.

The spelling of 7491668 in words is "seven million, four hundred ninety-one thousand, six hundred sixty-eight".