661130510 has 32 divisors (see below), whose sum is σ = 1265520672. Its totient is φ = 247813120.

The previous prime is 661130507. The next prime is 661130513. The reversal of 661130510 is 15031166.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (661130507) and next prime (661130513).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661130513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31265 + ... + 47955.

It is an arithmetic number, because the mean of its divisors is an integer number (39547521).

Almost surely, 2^661130510 is an apocalyptic number.

661130510 is a deficient number, since it is larger than the sum of its proper divisors (604390162).

661130510 is a wasteful number, since it uses less digits than its factorization.

661130510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16948.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 661130510 is about 25712.4582644289. The cubic root of 661130510 is about 871.1556009281.

Adding to 661130510 its reverse (15031166), we get a palindrome (676161676).

The spelling of 661130510 in words is "six hundred sixty-one million, one hundred thirty thousand, five hundred ten".