662065142581 has 2 divisors, whose sum is σ = 662065142582. Its totient is φ = 662065142580.

The previous prime is 662065142567. The next prime is 662065142621. The reversal of 662065142581 is 185241560266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384388840081 + 277676302500 = 619991^2 + 526950^2 .

It is a cyclic number.

It is not a de Polignac number, because 662065142581 - 2¹¹ = 662065140533 is a prime.

It is a super-2 number, since 2×662065142581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662065142281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331032571290 + 331032571291.

It is an arithmetic number, because the mean of its divisors is an integer number (331032571291).

Almost surely, 2^662065142581 is an apocalyptic number.

It is an amenable number.

662065142581 is a deficient number, since it is larger than the sum of its proper divisors (1).

662065142581 is an equidigital number, since it uses as much as digits as its factorization.

662065142581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 662065142581 in words is "six hundred sixty-two billion, sixty-five million, one hundred forty-two thousand, five hundred eighty-one".