78757667 has 2 divisors, whose sum is σ = 78757668. Its totient is φ = 78757666.

The previous prime is 78757619. The next prime is 78757687. The reversal of 78757667 is 76675787.

It is a strong prime.

It is an emirp because it is prime and its reverse (76675787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78757667 - 2⁸ = 78757411 is a prime.

It is a super-2 number, since 2×78757667² = 12405540222565778, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78757687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39378833 + 39378834.

It is an arithmetic number, because the mean of its divisors is an integer number (39378834).

Almost surely, 2^78757667 is an apocalyptic number.

78757667 is a deficient number, since it is larger than the sum of its proper divisors (1).

78757667 is an equidigital number, since it uses as much as digits as its factorization.

78757667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3457440, while the sum is 53.

The square root of 78757667 is about 8874.5516506469. The cubic root of 78757667 is about 428.6448539857.

The spelling of 78757667 in words is "seventy-eight million, seven hundred fifty-seven thousand, six hundred sixty-seven".