278081475667 has 2 divisors, whose sum is σ = 278081475668. Its totient is φ = 278081475666.

The previous prime is 278081475631. The next prime is 278081475701. The reversal of 278081475667 is 766574180872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278081475667 - 2²³ = 278073087059 is a prime.

It is not a weakly prime, because it can be changed into another prime (278081455667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139040737833 + 139040737834.

It is an arithmetic number, because the mean of its divisors is an integer number (139040737834).

Almost surely, 2^278081475667 is an apocalyptic number.

278081475667 is a deficient number, since it is larger than the sum of its proper divisors (1).

278081475667 is an equidigital number, since it uses as much as digits as its factorization.

278081475667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31610880, while the sum is 61.

The spelling of 278081475667 in words is "two hundred seventy-eight billion, eighty-one million, four hundred seventy-five thousand, six hundred sixty-seven".