662980891 has 2 divisors, whose sum is σ = 662980892. Its totient is φ = 662980890.

The previous prime is 662980823. The next prime is 662980931. The reversal of 662980891 is 198089266.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 662980891 - 2¹¹ = 662978843 is a prime.

It is not a weakly prime, because it can be changed into another prime (662900891) 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, 331490445 + 331490446.

It is an arithmetic number, because the mean of its divisors is an integer number (331490446).

Almost surely, 2^662980891 is an apocalyptic number.

662980891 is a deficient number, since it is larger than the sum of its proper divisors (1).

662980891 is an equidigital number, since it uses as much as digits as its factorization.

662980891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 662980891 is about 25748.4153104613. The cubic root of 662980891 is about 871.9675778949.

The spelling of 662980891 in words is "six hundred sixty-two million, nine hundred eighty thousand, eight hundred ninety-one".