662261617 has 2 divisors, whose sum is σ = 662261618. Its totient is φ = 662261616.

The previous prime is 662261599. The next prime is 662261623. The reversal of 662261617 is 716162266.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 597362481 + 64899136 = 24441^2 + 8056^2 .

It is a cyclic number.

It is not a de Polignac number, because 662261617 - 2¹¹ = 662259569 is a prime.

It is not a weakly prime, because it can be changed into another prime (662261657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331130808 + 331130809.

It is an arithmetic number, because the mean of its divisors is an integer number (331130809).

Almost surely, 2^662261617 is an apocalyptic number.

It is an amenable number.

662261617 is a deficient number, since it is larger than the sum of its proper divisors (1).

662261617 is an equidigital number, since it uses as much as digits as its factorization.

662261617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 662261617 is about 25734.4441750740. Note that the first 3 decimals coincide. The cubic root of 662261617 is about 871.6521286035.

The spelling of 662261617 in words is "six hundred sixty-two million, two hundred sixty-one thousand, six hundred seventeen".