6249305661 has 12 divisors (see below), whose sum is σ = 8563699872. Its totient is φ = 4053601008.

The previous prime is 6249305659. The next prime is 6249305683. The reversal of 6249305661 is 1665039426.

It is not a de Polignac number, because 6249305661 - 2¹ = 6249305659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6249305651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 756705 + ... + 764918.

It is an arithmetic number, because the mean of its divisors is an integer number (713641656).

Almost surely, 2^6249305661 is an apocalyptic number.

It is an amenable number.

6249305661 is a deficient number, since it is larger than the sum of its proper divisors (2314394211).

6249305661 is a wasteful number, since it uses less digits than its factorization.

6249305661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521700 (or 1521663 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 6249305661 is about 79052.5499968217. The cubic root of 6249305661 is about 1841.9475343475.

The spelling of 6249305661 in words is "six billion, two hundred forty-nine million, three hundred five thousand, six hundred sixty-one".