655166123 has 2 divisors, whose sum is σ = 655166124. Its totient is φ = 655166122.

The previous prime is 655166107. The next prime is 655166131. The reversal of 655166123 is 321661556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655166123 - 2⁴ = 655166107 is a prime.

It is a super-2 number, since 2×655166123² = 858485297453702258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (655166143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327583061 + 327583062.

It is an arithmetic number, because the mean of its divisors is an integer number (327583062).

Almost surely, 2^655166123 is an apocalyptic number.

655166123 is a deficient number, since it is larger than the sum of its proper divisors (1).

655166123 is an equidigital number, since it uses as much as digits as its factorization.

655166123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 35.

The square root of 655166123 is about 25596.2130597477. The cubic root of 655166123 is about 868.5279740538.

The spelling of 655166123 in words is "six hundred fifty-five million, one hundred sixty-six thousand, one hundred twenty-three".