77095661 has 2 divisors, whose sum is σ = 77095662. Its totient is φ = 77095660.

The previous prime is 77095657. The next prime is 77095687. The reversal of 77095661 is 16659077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67141636 + 9954025 = 8194^2 + 3155^2 .

It is an emirp because it is prime and its reverse (16659077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77095661 - 2² = 77095657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77095261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38547830 + 38547831.

It is an arithmetic number, because the mean of its divisors is an integer number (38547831).

Almost surely, 2^77095661 is an apocalyptic number.

It is an amenable number.

77095661 is a deficient number, since it is larger than the sum of its proper divisors (1).

77095661 is an equidigital number, since it uses as much as digits as its factorization.

77095661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 77095661 is about 8780.4134868467. The cubic root of 77095661 is about 425.6081922129.

The spelling of 77095661 in words is "seventy-seven million, ninety-five thousand, six hundred sixty-one".