662461549 has 2 divisors, whose sum is σ = 662461550. Its totient is φ = 662461548.

The previous prime is 662461519. The next prime is 662461567. The reversal of 662461549 is 945164266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 653569225 + 8892324 = 25565^2 + 2982^2 .

It is a cyclic number.

It is not a de Polignac number, because 662461549 - 2¹⁹ = 661937261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662461519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331230774 + 331230775.

It is an arithmetic number, because the mean of its divisors is an integer number (331230775).

Almost surely, 2^662461549 is an apocalyptic number.

It is an amenable number.

662461549 is a deficient number, since it is larger than the sum of its proper divisors (1).

662461549 is an equidigital number, since it uses as much as digits as its factorization.

662461549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The square root of 662461549 is about 25738.3284033754. The cubic root of 662461549 is about 871.7398349393.

The spelling of 662461549 in words is "six hundred sixty-two million, four hundred sixty-one thousand, five hundred forty-nine".