2670620681 has 2 divisors, whose sum is σ = 2670620682. Its totient is φ = 2670620680.

The previous prime is 2670620633. The next prime is 2670620717. The reversal of 2670620681 is 1860260762.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2658433600 + 12187081 = 51560^2 + 3491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2670620681 is a prime.

It is a super-2 number, since 2×2670620681² = 14264429643569807522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2670620621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1335310340 + 1335310341.

It is an arithmetic number, because the mean of its divisors is an integer number (1335310341).

Almost surely, 2^2670620681 is an apocalyptic number.

It is an amenable number.

2670620681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2670620681 is an equidigital number, since it uses as much as digits as its factorization.

2670620681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 2670620681 is about 51678.0483474367. The cubic root of 2670620681 is about 1387.4076003290.

The spelling of 2670620681 in words is "two billion, six hundred seventy million, six hundred twenty thousand, six hundred eighty-one".