77666734001 has 2 divisors, whose sum is σ = 77666734002. Its totient is φ = 77666734000.

The previous prime is 77666733997. The next prime is 77666734043. The reversal of 77666734001 is 10043766677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67574522401 + 10092211600 = 259951^2 + 100460^2 .

It is a cyclic number.

It is not a de Polignac number, because 77666734001 - 2² = 77666733997 is a prime.

It is not a weakly prime, because it can be changed into another prime (77666734091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38833367000 + 38833367001.

It is an arithmetic number, because the mean of its divisors is an integer number (38833367001).

Almost surely, 2^77666734001 is an apocalyptic number.

It is an amenable number.

77666734001 is a deficient number, since it is larger than the sum of its proper divisors (1).

77666734001 is an equidigital number, since it uses as much as digits as its factorization.

77666734001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 77666734001 in words is "seventy-seven billion, six hundred sixty-six million, seven hundred thirty-four thousand, one".