2878660420807 has 2 divisors, whose sum is σ = 2878660420808. Its totient is φ = 2878660420806.

The previous prime is 2878660420771. The next prime is 2878660420817. The reversal of 2878660420807 is 7080240668782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2878660420807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2878660420817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1439330210403 + 1439330210404.

It is an arithmetic number, because the mean of its divisors is an integer number (1439330210404).

Almost surely, 2^{2878660420807} is an apocalyptic number.

2878660420807 is a deficient number, since it is larger than the sum of its proper divisors (1).

2878660420807 is an equidigital number, since it uses as much as digits as its factorization.

2878660420807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14450688, while the sum is 58.

The spelling of 2878660420807 in words is "two trillion, eight hundred seventy-eight billion, six hundred sixty million, four hundred twenty thousand, eight hundred seven".