662201791 has 2 divisors, whose sum is σ = 662201792. Its totient is φ = 662201790.

The previous prime is 662201789. The next prime is 662201801. The reversal of 662201791 is 197102266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 662201791 - 2¹ = 662201789 is a prime.

It is a super-2 number, since 2×662201791² = 877022424007215362, which contains 22 as substring.

Together with 662201789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662201711) 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, 331100895 + 331100896.

It is an arithmetic number, because the mean of its divisors is an integer number (331100896).

Almost surely, 2^662201791 is an apocalyptic number.

662201791 is a deficient number, since it is larger than the sum of its proper divisors (1).

662201791 is an equidigital number, since it uses as much as digits as its factorization.

662201791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 662201791 is about 25733.2817767186. The cubic root of 662201791 is about 871.6258806529.

The spelling of 662201791 in words is "six hundred sixty-two million, two hundred one thousand, seven hundred ninety-one".