75664776697 has 2 divisors, whose sum is σ = 75664776698. Its totient is φ = 75664776696.

The previous prime is 75664776601. The next prime is 75664776703. The reversal of 75664776697 is 79667746657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67340769001 + 8324007696 = 259501^2 + 91236^2 .

It is an emirp because it is prime and its reverse (79667746657) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75664776697 - 2⁷ = 75664776569 is a prime.

It is not a weakly prime, because it can be changed into another prime (75664776197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37832388348 + 37832388349.

It is an arithmetic number, because the mean of its divisors is an integer number (37832388349).

Almost surely, 2^75664776697 is an apocalyptic number.

It is an amenable number.

75664776697 is a deficient number, since it is larger than the sum of its proper divisors (1).

75664776697 is an equidigital number, since it uses as much as digits as its factorization.

75664776697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560105280, while the sum is 70.

The spelling of 75664776697 in words is "seventy-five billion, six hundred sixty-four million, seven hundred seventy-six thousand, six hundred ninety-seven".