655166251 has 2 divisors, whose sum is σ = 655166252. Its totient is φ = 655166250.

The previous prime is 655166219. The next prime is 655166273. The reversal of 655166251 is 152661556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655166251 - 2⁵ = 655166219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 655166251.

It is not a weakly prime, because it can be changed into another prime (655106251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327583125 + 327583126.

It is an arithmetic number, because the mean of its divisors is an integer number (327583126).

Almost surely, 2^655166251 is an apocalyptic number.

655166251 is a deficient number, since it is larger than the sum of its proper divisors (1).

655166251 is an equidigital number, since it uses as much as digits as its factorization.

655166251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 37.

The square root of 655166251 is about 25596.2155601175. The cubic root of 655166251 is about 868.5280306154.

The spelling of 655166251 in words is "six hundred fifty-five million, one hundred sixty-six thousand, two hundred fifty-one".