168660425 has 12 divisors (see below), whose sum is σ = 212569356. Its totient is φ = 132715200.

The previous prime is 168660419. The next prime is 168660431. The reversal of 168660425 is 524066861.

It is an interprime number because it is at equal distance from previous prime (168660419) and next prime (168660431).

It can be written as a sum of positive squares in 6 ways, for example, as 18524416 + 150136009 = 4304^2 + 12253^2 .

It is not a de Polignac number, because 168660425 - 2⁶ = 168660361 is a prime.

It is a super-2 number, since 2×168660425² = 56892677922361250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53774 + ... + 56823.

It is an arithmetic number, because the mean of its divisors is an integer number (17714113).

Almost surely, 2^168660425 is an apocalyptic number.

It is an amenable number.

168660425 is a deficient number, since it is larger than the sum of its proper divisors (43908931).

168660425 is a wasteful number, since it uses less digits than its factorization.

168660425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110668 (or 110663 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 168660425 is about 12986.9328557593. The cubic root of 168660425 is about 552.5069305656.

The spelling of 168660425 in words is "one hundred sixty-eight million, six hundred sixty thousand, four hundred twenty-five".