1660561461 has 12 divisors (see below), whose sum is σ = 2583095788. Its totient is φ = 1021883904.

The previous prime is 1660561457. The next prime is 1660561471. The reversal of 1660561461 is 1641650661.

It is a happy number.

1660561461 is a `hidden beast` number, since 1 + 6 + 605 + 6 + 1 + 46 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 917726436 + 742835025 = 30294^2 + 27255^2 .

It is not a de Polignac number, because 1660561461 - 2² = 1660561457 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660561421) 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, 7096300 + ... + 7096533.

Almost surely, 2^1660561461 is an apocalyptic number.

It is an amenable number.

1660561461 is a deficient number, since it is larger than the sum of its proper divisors (922534327).

1660561461 is a wasteful number, since it uses less digits than its factorization.

1660561461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14192852 (or 14192849 counting only the distinct ones).

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

The square root of 1660561461 is about 40749.9872515317. The cubic root of 1660561461 is about 1184.1816258400.

The spelling of 1660561461 in words is "one billion, six hundred sixty million, five hundred sixty-one thousand, four hundred sixty-one".