1660157025 has 12 divisors (see below), whose sum is σ = 2744793072. Its totient is φ = 885417040.

The previous prime is 1660157011. The next prime is 1660157027. The reversal of 1660157025 is 5207510661.

It is not a de Polignac number, because 1660157025 - 2⁸ = 1660156769 is a prime.

It is a super-2 number, since 2×1660157025² = 5512242695313701250, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1660157027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11067639 + ... + 11067788.

It is an arithmetic number, because the mean of its divisors is an integer number (228732756).

Almost surely, 2^1660157025 is an apocalyptic number.

1660157025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1660157025 is a deficient number, since it is larger than the sum of its proper divisors (1084636047).

1660157025 is a wasteful number, since it uses less digits than its factorization.

1660157025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22135440 (or 22135435 counting only the distinct ones).

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

The square root of 1660157025 is about 40745.0245428813. The cubic root of 1660157025 is about 1184.0854807353.

Adding to 1660157025 its reverse (5207510661), we get a palindrome (6867667686).

The spelling of 1660157025 in words is "one billion, six hundred sixty million, one hundred fifty-seven thousand, twenty-five".