2507066981 has 2 divisors, whose sum is σ = 2507066982. Its totient is φ = 2507066980.

The previous prime is 2507066971. The next prime is 2507066987. The reversal of 2507066981 is 1896607052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1895296225 + 611770756 = 43535^2 + 24734^2 .

It is a cyclic number.

It is not a de Polignac number, because 2507066981 - 2²² = 2502872677 is a prime.

It is a super-2 number, since 2×2507066981² = 12570769694440908722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2507066987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253533490 + 1253533491.

It is an arithmetic number, because the mean of its divisors is an integer number (1253533491).

Almost surely, 2^2507066981 is an apocalyptic number.

It is an amenable number.

2507066981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2507066981 is an equidigital number, since it uses as much as digits as its factorization.

2507066981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 2507066981 is about 50070.6199382432. The cubic root of 2507066981 is about 1358.4864543541.

The spelling of 2507066981 in words is "two billion, five hundred seven million, sixty-six thousand, nine hundred eighty-one".