75676446721 has 2 divisors, whose sum is σ = 75676446722. Its totient is φ = 75676446720.

The previous prime is 75676446697. The next prime is 75676446749. The reversal of 75676446721 is 12764467657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72959952321 + 2716494400 = 270111^2 + 52120^2 .

It is a cyclic number.

It is not a de Polignac number, because 75676446721 - 2⁵ = 75676446689 is a prime.

It is not a weakly prime, because it can be changed into another prime (75676416721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37838223360 + 37838223361.

It is an arithmetic number, because the mean of its divisors is an integer number (37838223361).

Almost surely, 2^75676446721 is an apocalyptic number.

It is an amenable number.

75676446721 is a deficient number, since it is larger than the sum of its proper divisors (1).

75676446721 is an equidigital number, since it uses as much as digits as its factorization.

75676446721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11854080, while the sum is 55.

The spelling of 75676446721 in words is "seventy-five billion, six hundred seventy-six million, four hundred forty-six thousand, seven hundred twenty-one".