76668247 has 2 divisors, whose sum is σ = 76668248. Its totient is φ = 76668246.

The previous prime is 76668209. The next prime is 76668271. The reversal of 76668247 is 74286667.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 76668247 - 2¹⁵ = 76635479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76668197 and 76668206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76668047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38334123 + 38334124.

It is an arithmetic number, because the mean of its divisors is an integer number (38334124).

Almost surely, 2^76668247 is an apocalyptic number.

76668247 is a deficient number, since it is larger than the sum of its proper divisors (1).

76668247 is an equidigital number, since it uses as much as digits as its factorization.

76668247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 46.

The square root of 76668247 is about 8756.0406006368. The cubic root of 76668247 is about 424.8202183086.

The spelling of 76668247 in words is "seventy-six million, six hundred sixty-eight thousand, two hundred forty-seven".