25666070531 has 2 divisors, whose sum is σ = 25666070532. Its totient is φ = 25666070530.

The previous prime is 25666070483. The next prime is 25666070557. The reversal of 25666070531 is 13507066652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25666070531 is a prime.

It is a super-2 number, since 2×25666070531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25666070581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12833035265 + 12833035266.

It is an arithmetic number, because the mean of its divisors is an integer number (12833035266).

Almost surely, 2^25666070531 is an apocalyptic number.

25666070531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25666070531 is an equidigital number, since it uses as much as digits as its factorization.

25666070531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 25666070531 in words is "twenty-five billion, six hundred sixty-six million, seventy thousand, five hundred thirty-one".