662125561 has 2 divisors, whose sum is σ = 662125562. Its totient is φ = 662125560.

The previous prime is 662125543. The next prime is 662125573. The reversal of 662125561 is 165521266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 646125561 + 16000000 = 25419^2 + 4000^2 .

It is a cyclic number.

It is not a de Polignac number, because 662125561 - 2²³ = 653736953 is a prime.

It is not a weakly prime, because it can be changed into another prime (662125501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331062780 + 331062781.

It is an arithmetic number, because the mean of its divisors is an integer number (331062781).

Almost surely, 2^662125561 is an apocalyptic number.

It is an amenable number.

662125561 is a deficient number, since it is larger than the sum of its proper divisors (1).

662125561 is an equidigital number, since it uses as much as digits as its factorization.

662125561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 662125561 is about 25731.8005782728. The cubic root of 662125561 is about 871.5924333505.

The spelling of 662125561 in words is "six hundred sixty-two million, one hundred twenty-five thousand, five hundred sixty-one".