6701781901 has 2 divisors, whose sum is σ = 6701781902. Its totient is φ = 6701781900.

The previous prime is 6701781893. The next prime is 6701781949. The reversal of 6701781901 is 1091871076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6006405001 + 695376900 = 77501^2 + 26370^2 .

It is a cyclic number.

It is not a de Polignac number, because 6701781901 - 2³ = 6701781893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6701731901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3350890950 + 3350890951.

It is an arithmetic number, because the mean of its divisors is an integer number (3350890951).

Almost surely, 2^6701781901 is an apocalyptic number.

It is an amenable number.

6701781901 is a deficient number, since it is larger than the sum of its proper divisors (1).

6701781901 is an equidigital number, since it uses as much as digits as its factorization.

6701781901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 40.

The square root of 6701781901 is about 81864.4116878635. The cubic root of 6701781901 is about 1885.3707428855.

The spelling of 6701781901 in words is "six billion, seven hundred one million, seven hundred eighty-one thousand, nine hundred one".