662978111 has 2 divisors, whose sum is σ = 662978112. Its totient is φ = 662978110.

The previous prime is 662978089. The next prime is 662978117. The reversal of 662978111 is 111879266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 662978111 - 2⁶ = 662978047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662978117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331489055 + 331489056.

It is an arithmetic number, because the mean of its divisors is an integer number (331489056).

Almost surely, 2^662978111 is an apocalyptic number.

662978111 is a deficient number, since it is larger than the sum of its proper divisors (1).

662978111 is an equidigital number, since it uses as much as digits as its factorization.

662978111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 41.

The square root of 662978111 is about 25748.3613265000. The cubic root of 662978111 is about 871.9663591201.

The spelling of 662978111 in words is "six hundred sixty-two million, nine hundred seventy-eight thousand, one hundred eleven".