1040666513 has 2 divisors, whose sum is σ = 1040666514. Its totient is φ = 1040666512.

The previous prime is 1040666453. The next prime is 1040666569. The reversal of 1040666513 is 3156660401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 908600449 + 132066064 = 30143^2 + 11492^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040666513 - 2¹² = 1040662417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1040666513.

It is not a weakly prime, because it can be changed into another prime (1040666573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520333256 + 520333257.

It is an arithmetic number, because the mean of its divisors is an integer number (520333257).

Almost surely, 2^1040666513 is an apocalyptic number.

It is an amenable number.

1040666513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040666513 is an equidigital number, since it uses as much as digits as its factorization.

1040666513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1040666513 is about 32259.3631834232. The cubic root of 1040666513 is about 1013.3757947519.

The spelling of 1040666513 in words is "one billion, forty million, six hundred sixty-six thousand, five hundred thirteen".