6255512661 has 16 divisors (see below), whose sum is σ = 9116195328. Its totient is φ = 3798412800.

The previous prime is 6255512629. The next prime is 6255512689. The reversal of 6255512661 is 1662155526.

It is a happy number.

It is not a de Polignac number, because 6255512661 - 2⁵ = 6255512629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6255510661) 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, 1976760 + ... + 1979921.

It is an arithmetic number, because the mean of its divisors is an integer number (569762208).

Almost surely, 2^6255512661 is an apocalyptic number.

It is an amenable number.

6255512661 is a deficient number, since it is larger than the sum of its proper divisors (2860682667).

6255512661 is a wasteful number, since it uses less digits than its factorization.

6255512661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956732.

The product of its digits is 108000, while the sum is 39.

The square root of 6255512661 is about 79091.7989490693. The cubic root of 6255512661 is about 1842.5571586195.

The spelling of 6255512661 in words is "six billion, two hundred fifty-five million, five hundred twelve thousand, six hundred sixty-one".