77667669943 has 2 divisors, whose sum is σ = 77667669944. Its totient is φ = 77667669942.

The previous prime is 77667669929. The next prime is 77667669949. The reversal of 77667669943 is 34996676677.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77667669943 - 2¹³ = 77667661751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77667669949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38833834971 + 38833834972.

It is an arithmetic number, because the mean of its divisors is an integer number (38833834972).

Almost surely, 2^77667669943 is an apocalyptic number.

77667669943 is a deficient number, since it is larger than the sum of its proper divisors (1).

77667669943 is an equidigital number, since it uses as much as digits as its factorization.

77667669943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432081216, while the sum is 70.

The spelling of 77667669943 in words is "seventy-seven billion, six hundred sixty-seven million, six hundred sixty-nine thousand, nine hundred forty-three".