658940081 has 2 divisors, whose sum is σ = 658940082. Its totient is φ = 658940080.

The previous prime is 658940063. The next prime is 658940099. The reversal of 658940081 is 180049856.

It is a balanced prime because it is at equal distance from previous prime (658940063) and next prime (658940099).

It can be written as a sum of positive squares in only one way, i.e., 465869056 + 193071025 = 21584^2 + 13895^2 .

It is a cyclic number.

It is not a de Polignac number, because 658940081 - 2⁶ = 658940017 is a prime.

It is a super-2 number, since 2×658940081² = 868404060696573122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (658945081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329470040 + 329470041.

It is an arithmetic number, because the mean of its divisors is an integer number (329470041).

Almost surely, 2^658940081 is an apocalyptic number.

It is an amenable number.

658940081 is a deficient number, since it is larger than the sum of its proper divisors (1).

658940081 is an equidigital number, since it uses as much as digits as its factorization.

658940081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 658940081 is about 25669.8282230326. The cubic root of 658940081 is about 870.1924447666.

The spelling of 658940081 in words is "six hundred fifty-eight million, nine hundred forty thousand, eighty-one".