7661345791 has 8 divisors (see below), whose sum is σ = 8377689168. Its totient is φ = 6948312000.

The previous prime is 7661345789. The next prime is 7661345801. The reversal of 7661345791 is 1975431667.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7661345791 - 2¹ = 7661345789 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 (7661345761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822550 + ... + 831811.

It is an arithmetic number, because the mean of its divisors is an integer number (1047211146).

Almost surely, 2^7661345791 is an apocalyptic number.

7661345791 is a deficient number, since it is larger than the sum of its proper divisors (716343377).

7661345791 is a wasteful number, since it uses less digits than its factorization.

7661345791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654793.

The product of its digits is 952560, while the sum is 49.

The square root of 7661345791 is about 87529.1139621555. The cubic root of 7661345791 is about 1971.3709603775.

The spelling of 7661345791 in words is "seven billion, six hundred sixty-one million, three hundred forty-five thousand, seven hundred ninety-one".