1660730025 has 24 divisors (see below), whose sum is σ = 2747567200. Its totient is φ = 885133440.

The previous prime is 1660729963. The next prime is 1660730039. The reversal of 1660730025 is 5200370661.

It is not a de Polignac number, because 1660730025 - 2¹³ = 1660721833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660729974 and 1660730001.

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, 120909 + ... + 133941.

Almost surely, 2^1660730025 is an apocalyptic number.

1660730025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1660730025 is a deficient number, since it is larger than the sum of its proper divisors (1086837175).

1660730025 is a wasteful number, since it uses less digits than its factorization.

1660730025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14745 (or 14740 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 1660730025 is about 40752.0554696324. The cubic root of 1660730025 is about 1184.2216933398.

The spelling of 1660730025 in words is "one billion, six hundred sixty million, seven hundred thirty thousand, twenty-five".