7040661787 has 2 divisors, whose sum is σ = 7040661788. Its totient is φ = 7040661786.

The previous prime is 7040661773. The next prime is 7040661811. The reversal of 7040661787 is 7871660407.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7040661787 - 2⁷ = 7040661659 is a prime.

It is not a weakly prime, because it can be changed into another prime (7040661487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3520330893 + 3520330894.

It is an arithmetic number, because the mean of its divisors is an integer number (3520330894).

Almost surely, 2^7040661787 is an apocalyptic number.

7040661787 is a deficient number, since it is larger than the sum of its proper divisors (1).

7040661787 is an equidigital number, since it uses as much as digits as its factorization.

7040661787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 7040661787 is about 83908.6514431021. The cubic root of 7040661787 is about 1916.6279958558.

The spelling of 7040661787 in words is "seven billion, forty million, six hundred sixty-one thousand, seven hundred eighty-seven".