6651155506573 has 2 divisors, whose sum is σ = 6651155506574. Its totient is φ = 6651155506572.

The previous prime is 6651155506561. The next prime is 6651155506627. The reversal of 6651155506573 is 3756055511566.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6111985451049 + 539170055524 = 2472243^2 + 734282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6651155506573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6651155504573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325577753286 + 3325577753287.

It is an arithmetic number, because the mean of its divisors is an integer number (3325577753287).

Almost surely, 2^{6651155506573} is an apocalyptic number.

It is an amenable number.

6651155506573 is a deficient number, since it is larger than the sum of its proper divisors (1).

6651155506573 is an equidigital number, since it uses as much as digits as its factorization.

6651155506573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14175000, while the sum is 55.

The spelling of 6651155506573 in words is "six trillion, six hundred fifty-one billion, one hundred fifty-five million, five hundred six thousand, five hundred seventy-three".