77966201 has 2 divisors, whose sum is σ = 77966202. Its totient is φ = 77966200.

The previous prime is 77966191. The next prime is 77966219. The reversal of 77966201 is 10266977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66406201 + 11560000 = 8149^2 + 3400^2 .

It is a cyclic number.

It is not a de Polignac number, because 77966201 - 2⁶ = 77966137 is a prime.

It is not a weakly prime, because it can be changed into another prime (77966261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38983100 + 38983101.

It is an arithmetic number, because the mean of its divisors is an integer number (38983101).

Almost surely, 2^77966201 is an apocalyptic number.

It is an amenable number.

77966201 is a deficient number, since it is larger than the sum of its proper divisors (1).

77966201 is an equidigital number, since it uses as much as digits as its factorization.

77966201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 77966201 is about 8829.8471674203. The cubic root of 77966201 is about 427.2041448986.

The spelling of 77966201 in words is "seventy-seven million, nine hundred sixty-six thousand, two hundred one".