1660571025 has 48 divisors (see below), whose sum is σ = 2896213440. Its totient is φ = 837216000.

The previous prime is 1660570981. The next prime is 1660571027. The reversal of 1660571025 is 5201750661.

It is not a de Polignac number, because 1660571025 - 2²⁵ = 1627016593 is a prime.

It is a super-2 number, since 2×1660571025² = 5514992258139101250, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1660571027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 872575 + ... + 874475.

It is an arithmetic number, because the mean of its divisors is an integer number (60337780).

Almost surely, 2^1660571025 is an apocalyptic number.

1660571025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1660571025 is a deficient number, since it is larger than the sum of its proper divisors (1235642415).

1660571025 is a wasteful number, since it uses less digits than its factorization.

1660571025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546 (or 2541 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 1660571025 is about 40750.1046010927. The cubic root of 1660571025 is about 1184.1838992661.

The spelling of 1660571025 in words is "one billion, six hundred sixty million, five hundred seventy-one thousand, twenty-five".