75656665757 has 2 divisors, whose sum is σ = 75656665758. Its totient is φ = 75656665756.

The previous prime is 75656665753. The next prime is 75656665781. The reversal of 75656665757 is 75756665657.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40831880761 + 34824784996 = 202069^2 + 186614^2 .

It is a cyclic number.

It is not a de Polignac number, because 75656665757 - 2² = 75656665753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75656665693 and 75656665702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75656665753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37828332878 + 37828332879.

It is an arithmetic number, because the mean of its divisors is an integer number (37828332879).

Almost surely, 2^75656665757 is an apocalyptic number.

It is an amenable number.

75656665757 is a deficient number, since it is larger than the sum of its proper divisors (1).

75656665757 is an equidigital number, since it uses as much as digits as its factorization.

75656665757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 277830000, while the sum is 65.

The spelling of 75656665757 in words is "seventy-five billion, six hundred fifty-six million, six hundred sixty-five thousand, seven hundred fifty-seven".