662647 has 2 divisors, whose sum is σ = 662648. Its totient is φ = 662646.

The previous prime is 662639. The next prime is 662657. The reversal of 662647 is 746266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 662647 - 2³ = 662639 is a prime.

662647 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331323 + 331324.

It is an arithmetic number, because the mean of its divisors is an integer number (331324).

2⁶⁶²⁶⁴⁷ is an apocalyptic number.

662647 is a deficient number, since it is larger than the sum of its proper divisors (1).

662647 is an equidigital number, since it uses as much as digits as its factorization.

662647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 662647 is about 814.0313261785. The cubic root of 662647 is about 87.1821172964.

The spelling of 662647 in words is "six hundred sixty-two thousand, six hundred forty-seven".