6522998661 has 16 divisors (see below), whose sum is σ = 10172318400. Its totient is φ = 4119788304.

The previous prime is 6522998633. The next prime is 6522998687. The reversal of 6522998661 is 1668992256.

It is a happy number.

It is not a de Polignac number, because 6522998661 - 2¹⁵ = 6522965893 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6522998598 and 6522998607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6522998611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6357186 + ... + 6358211.

It is an arithmetic number, because the mean of its divisors is an integer number (635769900).

Almost surely, 2^6522998661 is an apocalyptic number.

It is an amenable number.

6522998661 is a deficient number, since it is larger than the sum of its proper divisors (3649319739).

6522998661 is a wasteful number, since it uses less digits than its factorization.

6522998661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12715425 (or 12715419 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 6522998661 is about 80765.0831795523. The cubic root of 6522998661 is about 1868.4540838646.

The spelling of 6522998661 in words is "six billion, five hundred twenty-two million, nine hundred ninety-eight thousand, six hundred sixty-one".