6997778003 has 2 divisors, whose sum is σ = 6997778004. Its totient is φ = 6997778002.

The previous prime is 6997777937. The next prime is 6997778009. The reversal of 6997778003 is 3008777996.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6997778003 - 2¹⁸ = 6997515859 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6997778003.

It is not a weakly prime, because it can be changed into another prime (6997778009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3498889001 + 3498889002.

It is an arithmetic number, because the mean of its divisors is an integer number (3498889002).

Almost surely, 2^6997778003 is an apocalyptic number.

6997778003 is a deficient number, since it is larger than the sum of its proper divisors (1).

6997778003 is an equidigital number, since it uses as much as digits as its factorization.

6997778003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000752, while the sum is 56.

The square root of 6997778003 is about 83652.7226275391. The cubic root of 6997778003 is about 1912.7287552879.

The spelling of 6997778003 in words is "six billion, nine hundred ninety-seven million, seven hundred seventy-eight thousand, three".