1660125403 has 4 divisors (see below), whose sum is σ = 1672798248. Its totient is φ = 1647452560.

The previous prime is 1660125391. The next prime is 1660125407. The reversal of 1660125403 is 3045210661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3045210661 = 71 ⋅42890291.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660125403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660125407) 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, 6336226 + ... + 6336487.

It is an arithmetic number, because the mean of its divisors is an integer number (418199562).

Almost surely, 2^1660125403 is an apocalyptic number.

1660125403 is a deficient number, since it is larger than the sum of its proper divisors (12672845).

1660125403 is a wasteful number, since it uses less digits than its factorization.

1660125403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12672844.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1660125403 is about 40744.6364936540. The cubic root of 1660125403 is about 1184.0779626937.

The spelling of 1660125403 in words is "one billion, six hundred sixty million, one hundred twenty-five thousand, four hundred three".