662564993 has 2 divisors, whose sum is σ = 662564994. Its totient is φ = 662564992.

The previous prime is 662564927. The next prime is 662565011. The reversal of 662564993 is 399465266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419922064 + 242642929 = 20492^2 + 15577^2 .

It is a cyclic number.

It is not a de Polignac number, because 662564993 - 2¹⁰ = 662563969 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (662564393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331282496 + 331282497.

It is an arithmetic number, because the mean of its divisors is an integer number (331282497).

Almost surely, 2^662564993 is an apocalyptic number.

It is an amenable number.

662564993 is a deficient number, since it is larger than the sum of its proper divisors (1).

662564993 is an equidigital number, since it uses as much as digits as its factorization.

662564993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 50.

The square root of 662564993 is about 25740.3378571455. The cubic root of 662564993 is about 871.7852069121.

The spelling of 662564993 in words is "six hundred sixty-two million, five hundred sixty-four thousand, nine hundred ninety-three".