5385400661 has 2 divisors, whose sum is σ = 5385400662. Its totient is φ = 5385400660.

The previous prime is 5385400639. The next prime is 5385400673. The reversal of 5385400661 is 1660045835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5385358225 + 42436 = 73385^2 + 206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5385400661 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5385400621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2692700330 + 2692700331.

It is an arithmetic number, because the mean of its divisors is an integer number (2692700331).

Almost surely, 2^5385400661 is an apocalyptic number.

It is an amenable number.

5385400661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5385400661 is an equidigital number, since it uses as much as digits as its factorization.

5385400661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 5385400661 is about 73385.2891320870. The cubic root of 5385400661 is about 1752.8281520054.

The spelling of 5385400661 in words is "five billion, three hundred eighty-five million, four hundred thousand, six hundred sixty-one".