133102661 has 2 divisors, whose sum is σ = 133102662. Its totient is φ = 133102660.

The previous prime is 133102601. The next prime is 133102691. The reversal of 133102661 is 166201331.

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., 70392100 + 62710561 = 8390^2 + 7919^2 .

It is a cyclic number.

It is not a de Polignac number, because 133102661 - 2¹⁰ = 133101637 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 (133102601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66551330 + 66551331.

It is an arithmetic number, because the mean of its divisors is an integer number (66551331).

Almost surely, 2^133102661 is an apocalyptic number.

It is an amenable number.

133102661 is a deficient number, since it is larger than the sum of its proper divisors (1).

133102661 is an equidigital number, since it uses as much as digits as its factorization.

133102661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 133102661 is about 11537.0126549294. The cubic root of 133102661 is about 510.5781742279.

Adding to 133102661 its reverse (166201331), we get a palindrome (299303992).

The spelling of 133102661 in words is "one hundred thirty-three million, one hundred two thousand, six hundred sixty-one".