2066531251 has 2 divisors, whose sum is σ = 2066531252. Its totient is φ = 2066531250.

The previous prime is 2066531249. The next prime is 2066531273. The reversal of 2066531251 is 1521356602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2066531251 - 2¹ = 2066531249 is a prime.

It is a super-2 number, since 2×2066531251² = 8541102822719250002, which contains 22 as substring.

Together with 2066531249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2066534251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033265625 + 1033265626.

It is an arithmetic number, because the mean of its divisors is an integer number (1033265626).

Almost surely, 2^2066531251 is an apocalyptic number.

2066531251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2066531251 is an equidigital number, since it uses as much as digits as its factorization.

2066531251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2066531251 is about 45459.1162584580. The cubic root of 2066531251 is about 1273.7396235916.

Adding to 2066531251 its reverse (1521356602), we get a palindrome (3587887853).

The spelling of 2066531251 in words is "two billion, sixty-six million, five hundred thirty-one thousand, two hundred fifty-one".