77145667 has 2 divisors, whose sum is σ = 77145668. Its totient is φ = 77145666.

The previous prime is 77145647. The next prime is 77145671. The reversal of 77145667 is 76654177.

It is a strong prime.

It is an emirp because it is prime and its reverse (76654177) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77145667 is a prime.

It is not a weakly prime, because it can be changed into another prime (77145637) 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, 38572833 + 38572834.

It is an arithmetic number, because the mean of its divisors is an integer number (38572834).

Almost surely, 2^77145667 is an apocalyptic number.

77145667 is a deficient number, since it is larger than the sum of its proper divisors (1).

77145667 is an equidigital number, since it uses as much as digits as its factorization.

77145667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 43.

The square root of 77145667 is about 8783.2606132347. The cubic root of 77145667 is about 425.7001920441.

The spelling of 77145667 in words is "seventy-seven million, one hundred forty-five thousand, six hundred sixty-seven".