1705666225 has 6 divisors (see below), whose sum is σ = 2115026150. Its totient is φ = 1364532960.

The previous prime is 1705666199. The next prime is 1705666231. The reversal of 1705666225 is 5226665071.

It can be written as a sum of positive squares in 3 ways, for example, as 371371441 + 1334294784 = 19271^2 + 36528^2 .

It is not a de Polignac number, because 1705666225 - 2¹⁹ = 1705141937 is a prime.

It is a super-2 number, since 2×1705666225² = 5818594542211501250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34113300 + ... + 34113349.

Almost surely, 2^1705666225 is an apocalyptic number.

It is an amenable number.

1705666225 is a deficient number, since it is larger than the sum of its proper divisors (409359925).

1705666225 is an equidigital number, since it uses as much as digits as its factorization.

1705666225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68226659 (or 68226654 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 1705666225 is about 41299.7121660672. The cubic root of 1705666225 is about 1194.8077105211.

The spelling of 1705666225 in words is "one billion, seven hundred five million, six hundred sixty-six thousand, two hundred twenty-five".