6660650533 has 2 divisors, whose sum is σ = 6660650534. Its totient is φ = 6660650532.

The previous prime is 6660650527. The next prime is 6660650537. The reversal of 6660650533 is 3350560666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6510391969 + 150258564 = 80687^2 + 12258^2 .

It is a cyclic number.

It is not a de Polignac number, because 6660650533 - 2²⁵ = 6627096101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6660650537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330325266 + 3330325267.

It is an arithmetic number, because the mean of its divisors is an integer number (3330325267).

Almost surely, 2^6660650533 is an apocalyptic number.

It is an amenable number.

6660650533 is a deficient number, since it is larger than the sum of its proper divisors (1).

6660650533 is an equidigital number, since it uses as much as digits as its factorization.

6660650533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 40.

The square root of 6660650533 is about 81612.8086332041. The cubic root of 6660650533 is about 1881.5057475245.

The spelling of 6660650533 in words is "six billion, six hundred sixty million, six hundred fifty thousand, five hundred thirty-three".