662642653 has 2 divisors, whose sum is σ = 662642654. Its totient is φ = 662642652.

The previous prime is 662642641. The next prime is 662642683. The reversal of 662642653 is 356246266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558235129 + 104407524 = 23627^2 + 10218^2 .

It is a cyclic number.

It is not a de Polignac number, because 662642653 - 2⁵ = 662642621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662642683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331321326 + 331321327.

It is an arithmetic number, because the mean of its divisors is an integer number (331321327).

Almost surely, 2^662642653 is an apocalyptic number.

It is an amenable number.

662642653 is a deficient number, since it is larger than the sum of its proper divisors (1).

662642653 is an equidigital number, since it uses as much as digits as its factorization.

662642653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 40.

The square root of 662642653 is about 25741.8463401521. The cubic root of 662642653 is about 871.8192665615.

The spelling of 662642653 in words is "six hundred sixty-two million, six hundred forty-two thousand, six hundred fifty-three".