1668426025 has 24 divisors (see below), whose sum is σ = 2378597760. Its totient is φ = 1137192960.

The previous prime is 1668425981. The next prime is 1668426047. The reversal of 1668426025 is 5206248661.

It is not a de Polignac number, because 1668426025 - 2⁷ = 1668425897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 681 + ... + 57769.

It is an arithmetic number, because the mean of its divisors is an integer number (99108240).

Almost surely, 2^1668426025 is an apocalyptic number.

It is an amenable number.

1668426025 is a deficient number, since it is larger than the sum of its proper divisors (710171735).

1668426025 is a wasteful number, since it uses less digits than its factorization.

1668426025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57273 (or 57268 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 1668426025 is about 40846.3710138367. The cubic root of 1668426025 is about 1186.0481447771.

The spelling of 1668426025 in words is "one billion, six hundred sixty-eight million, four hundred twenty-six thousand, twenty-five".