1660616200125 has 48 divisors (see below), whose sum is σ = 3034544982768. Its totient is φ = 873529574400.

The previous prime is 1660616200121. The next prime is 1660616200127. The reversal of 1660616200125 is 5210026160661.

1660616200125 is a `hidden beast` number, since 1 + 6 + 6 + 0 + 6 + 1 + 620 + 0 + 1 + 25 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 438737991129 + 1221878208996 = 662373^2 + 1105386^2 .

It is not a de Polignac number, because 1660616200125 - 2² = 1660616200121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1660616200125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660616200121) 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, 10028172 + ... + 10192421.

It is an arithmetic number, because the mean of its divisors is an integer number (63219687141).

Almost surely, 2^{1660616200125} is an apocalyptic number.

1660616200125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1660616200125 is a deficient number, since it is larger than the sum of its proper divisors (1373928782643).

1660616200125 is a wasteful number, since it uses less digits than its factorization.

1660616200125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20220687 (or 20220674 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 1660616200125 in words is "one trillion, six hundred sixty billion, six hundred sixteen million, two hundred thousand, one hundred twenty-five".