1660142547 has 20 divisors (see below), whose sum is σ = 2834247856. Its totient is φ = 948652560.

The previous prime is 1660142513. The next prime is 1660142593. The reversal of 1660142547 is 7452410661.

1660142547 is a `hidden beast` number, since 1 + 6 + 601 + 4 + 2 + 5 + 47 = 666.

It is not a de Polignac number, because 1660142547 - 2⁸ = 1660142291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660142447) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1463404 + ... + 1464537.

Almost surely, 2^1660142547 is an apocalyptic number.

1660142547 is a deficient number, since it is larger than the sum of its proper divisors (1174105309).

1660142547 is an equidigital number, since it uses as much as digits as its factorization.

1660142547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927960 (or 2927951 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1660142547 is about 40744.8468766297. The cubic root of 1660142547 is about 1184.0820386434.

The spelling of 1660142547 in words is "one billion, six hundred sixty million, one hundred forty-two thousand, five hundred forty-seven".