2052667681 has 2 divisors, whose sum is σ = 2052667682. Its totient is φ = 2052667680.

The previous prime is 2052667633. The next prime is 2052667699. The reversal of 2052667681 is 1867662502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1157700625 + 894967056 = 34025^2 + 29916^2 .

It is a cyclic number.

It is not a de Polignac number, because 2052667681 - 2¹¹ = 2052665633 is a prime.

It is a super-2 number, since 2×2052667681² = 8426889217243835522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2052667081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026333840 + 1026333841.

It is an arithmetic number, because the mean of its divisors is an integer number (1026333841).

Almost surely, 2^2052667681 is an apocalyptic number.

It is an amenable number.

2052667681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2052667681 is an equidigital number, since it uses as much as digits as its factorization.

2052667681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 2052667681 is about 45306.3757213044. The cubic root of 2052667681 is about 1270.8848858143.

The spelling of 2052667681 in words is "two billion, fifty-two million, six hundred sixty-seven thousand, six hundred eighty-one".