1668530 has 8 divisors (see below), whose sum is σ = 3003372. Its totient is φ = 667408.

The previous prime is 1668521. The next prime is 1668539. The reversal of 1668530 is 358661.

It is an interprime number because it is at equal distance from previous prime (1668521) and next prime (1668539).

It can be written as a sum of positive squares in 2 ways, for example, as 1666681 + 1849 = 1291^2 + 43^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1668493 and 1668502.

It is not an unprimeable number, because it can be changed into a prime (1668539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83417 + ... + 83436.

2^1668530 is an apocalyptic number.

1668530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668530 is a deficient number, since it is larger than the sum of its proper divisors (1334842).

1668530 is a wasteful number, since it uses less digits than its factorization.

1668530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166860.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1668530 is about 1291.7159130397. The cubic root of 1668530 is about 118.6072782128.

The spelling of 1668530 in words is "one million, six hundred sixty-eight thousand, five hundred thirty".