65882981 has 2 divisors, whose sum is σ = 65882982. Its totient is φ = 65882980.

The previous prime is 65882969. The next prime is 65882987. The reversal of 65882981 is 18928856.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49350625 + 16532356 = 7025^2 + 4066^2 .

It is a cyclic number.

It is not a de Polignac number, because 65882981 - 2⁶ = 65882917 is a prime.

It is a super-2 number, since 2×65882981² = 8681134370892722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65882987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32941490 + 32941491.

It is an arithmetic number, because the mean of its divisors is an integer number (32941491).

Almost surely, 2^65882981 is an apocalyptic number.

It is an amenable number.

65882981 is a deficient number, since it is larger than the sum of its proper divisors (1).

65882981 is an equidigital number, since it uses as much as digits as its factorization.

65882981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 47.

The square root of 65882981 is about 8116.8331878880. The cubic root of 65882981 is about 403.8850214415.

The spelling of 65882981 in words is "sixty-five million, eight hundred eighty-two thousand, nine hundred eighty-one".