662531878441 has 2 divisors, whose sum is σ = 662531878442. Its totient is φ = 662531878440.

The previous prime is 662531878417. The next prime is 662531878451. The reversal of 662531878441 is 144878135266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 521723068416 + 140808810025 = 722304^2 + 375245^2 .

It is a cyclic number.

It is not a de Polignac number, because 662531878441 - 2¹⁵ = 662531845673 is a prime.

It is not a weakly prime, because it can be changed into another prime (662531878451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331265939220 + 331265939221.

It is an arithmetic number, because the mean of its divisors is an integer number (331265939221).

Almost surely, 2^662531878441 is an apocalyptic number.

It is an amenable number.

662531878441 is a deficient number, since it is larger than the sum of its proper divisors (1).

662531878441 is an equidigital number, since it uses as much as digits as its factorization.

662531878441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 55.

The spelling of 662531878441 in words is "six hundred sixty-two billion, five hundred thirty-one million, eight hundred seventy-eight thousand, four hundred forty-one".