1668874810 has 8 divisors (see below), whose sum is σ = 3003974676. Its totient is φ = 667549920.

The previous prime is 1668874789. The next prime is 1668874847. The reversal of 1668874810 is 184788661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1551650881 + 117223929 = 39391^2 + 10827^2 .

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

It is a super-2 number, since 2×1668874810² = 5570286262905072200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83443731 + ... + 83443750.

Almost surely, 2^1668874810 is an apocalyptic number.

1668874810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668874810 is a deficient number, since it is larger than the sum of its proper divisors (1335099866).

1668874810 is a wasteful number, since it uses less digits than its factorization.

1668874810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166887488.

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 1668874810 is about 40851.8642169485. The cubic root of 1668874810 is about 1186.1544791086.

The spelling of 1668874810 in words is "one billion, six hundred sixty-eight million, eight hundred seventy-four thousand, eight hundred ten".