36661591903 has 2 divisors, whose sum is σ = 36661591904. Its totient is φ = 36661591902.

The previous prime is 36661591877. The next prime is 36661591919. The reversal of 36661591903 is 30919516663.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 36661591903 - 2⁵ = 36661591871 is a prime.

It is a super-2 number, since 2×36661591903² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36661591933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18330795951 + 18330795952.

It is an arithmetic number, because the mean of its divisors is an integer number (18330795952).

Almost surely, 2^36661591903 is an apocalyptic number.

36661591903 is a deficient number, since it is larger than the sum of its proper divisors (1).

36661591903 is an equidigital number, since it uses as much as digits as its factorization.

36661591903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 787320, while the sum is 49.

The spelling of 36661591903 in words is "thirty-six billion, six hundred sixty-one million, five hundred ninety-one thousand, nine hundred three".