77668471 has 2 divisors, whose sum is σ = 77668472. Its totient is φ = 77668470.

The previous prime is 77668463. The next prime is 77668499. The reversal of 77668471 is 17486677.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77668471 - 2³ = 77668463 is a prime.

It is a super-3 number, since 3×77668471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77668441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38834235 + 38834236.

It is an arithmetic number, because the mean of its divisors is an integer number (38834236).

Almost surely, 2^77668471 is an apocalyptic number.

77668471 is a deficient number, since it is larger than the sum of its proper divisors (1).

77668471 is an equidigital number, since it uses as much as digits as its factorization.

77668471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 46.

The square root of 77668471 is about 8812.9717462386. The cubic root of 77668471 is about 426.6596622250.

The spelling of 77668471 in words is "seventy-seven million, six hundred sixty-eight thousand, four hundred seventy-one".