100510661 has 2 divisors, whose sum is σ = 100510662. Its totient is φ = 100510660.

The previous prime is 100510603. The next prime is 100510679. The reversal of 100510661 is 166015001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100120036 + 390625 = 10006^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 100510661 - 2¹⁰ = 100509637 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 (100510601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50255330 + 50255331.

It is an arithmetic number, because the mean of its divisors is an integer number (50255331).

Almost surely, 2^100510661 is an apocalyptic number.

It is an amenable number.

100510661 is a deficient number, since it is larger than the sum of its proper divisors (1).

100510661 is an equidigital number, since it uses as much as digits as its factorization.

100510661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 100510661 is about 10025.5005361328. The cubic root of 100510661 is about 464.9476350637.

Adding to 100510661 its reverse (166015001), we get a palindrome (266525662).

The spelling of 100510661 in words is "one hundred million, five hundred ten thousand, six hundred sixty-one".