1660025047 has 4 divisors (see below), whose sum is σ = 1717267320. Its totient is φ = 1602782776.

The previous prime is 1660025039. The next prime is 1660025053. The reversal of 1660025047 is 7405200661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7405200661 = 67 ⋅110525383.

It is a cyclic number.

It is not a de Polignac number, because 1660025047 - 2³ = 1660025039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660025347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28621093 + ... + 28621150.

It is an arithmetic number, because the mean of its divisors is an integer number (429316830).

Almost surely, 2^1660025047 is an apocalyptic number.

1660025047 is a deficient number, since it is larger than the sum of its proper divisors (57242273).

1660025047 is an equidigital number, since it uses as much as digits as its factorization.

1660025047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57242272.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1660025047 is about 40743.4049509856. The cubic root of 1660025047 is about 1184.0541027045.

The spelling of 1660025047 in words is "one billion, six hundred sixty million, twenty-five thousand, forty-seven".