5501550661 has 2 divisors, whose sum is σ = 5501550662. Its totient is φ = 5501550660.

The previous prime is 5501550653. The next prime is 5501550667. The reversal of 5501550661 is 1660551055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4055269761 + 1446280900 = 63681^2 + 38030^2 .

It is a cyclic number.

It is not a de Polignac number, because 5501550661 - 2³ = 5501550653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5501550667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2750775330 + 2750775331.

It is an arithmetic number, because the mean of its divisors is an integer number (2750775331).

Almost surely, 2^5501550661 is an apocalyptic number.

It is an amenable number.

5501550661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5501550661 is an equidigital number, since it uses as much as digits as its factorization.

5501550661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 5501550661 is about 74172.4386885048. The cubic root of 5501550661 is about 1765.3400421807.

The spelling of 5501550661 in words is "five billion, five hundred one million, five hundred fifty thousand, six hundred sixty-one".