7751500661 has 12 divisors (see below), whose sum is σ = 8205789024. Its totient is φ = 7321228200.

The previous prime is 7751500649. The next prime is 7751500711. The reversal of 7751500661 is 1660051577.

It is not a de Polignac number, because 7751500661 - 2¹⁴ = 7751484277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7751500621) 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, 87056 + ... + 151926.

It is an arithmetic number, because the mean of its divisors is an integer number (683815752).

Almost surely, 2^7751500661 is an apocalyptic number.

It is an amenable number.

7751500661 is a deficient number, since it is larger than the sum of its proper divisors (454288363).

7751500661 is a wasteful number, since it uses less digits than its factorization.

7751500661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65240 (or 65221 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 7751500661 is about 88042.6070774827. The cubic root of 7751500661 is about 1979.0735267813.

The spelling of 7751500661 in words is "seven billion, seven hundred fifty-one million, five hundred thousand, six hundred sixty-one".