6630657261 has 16 divisors (see below), whose sum is σ = 9086697408. Its totient is φ = 4297708800.

The previous prime is 6630657223. The next prime is 6630657331. The reversal of 6630657261 is 1627560366.

It is not a de Polignac number, because 6630657261 - 2⁶ = 6630657197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6630657961) 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, 129126 + ... + 173016.

It is an arithmetic number, because the mean of its divisors is an integer number (567918588).

Almost surely, 2^6630657261 is an apocalyptic number.

It is an amenable number.

6630657261 is a deficient number, since it is larger than the sum of its proper divisors (2456040147).

6630657261 is a wasteful number, since it uses less digits than its factorization.

6630657261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45292.

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 6630657261 is about 81428.8478427639. The cubic root of 6630657261 is about 1878.6773234764.

The spelling of 6630657261 in words is "six billion, six hundred thirty million, six hundred fifty-seven thousand, two hundred sixty-one".