1660125197 has 4 divisors (see below), whose sum is σ = 1681139520. Its totient is φ = 1639110876.

The previous prime is 1660125151. The next prime is 1660125199. The reversal of 1660125197 is 7915210661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7915210661 = 53849 ⋅146989.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660125197 is a prime.

It is a super-4 number, since 4×1660125197⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660125197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660125199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10507043 + ... + 10507200.

It is an arithmetic number, because the mean of its divisors is an integer number (420284880).

Almost surely, 2^1660125197 is an apocalyptic number.

It is an amenable number.

1660125197 is a deficient number, since it is larger than the sum of its proper divisors (21014323).

1660125197 is an equidigital number, since it uses as much as digits as its factorization.

1660125197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21014322.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 1660125197 is about 40744.6339657138. The cubic root of 1660125197 is about 1184.0779137175.

The spelling of 1660125197 in words is "one billion, six hundred sixty million, one hundred twenty-five thousand, one hundred ninety-seven".