1661107460 has 24 divisors (see below), whose sum is σ = 3490263000. Its totient is φ = 664073984.

The previous prime is 1661107457. The next prime is 1661107477. The reversal of 1661107460 is 647011661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4129024 + 1656978436 = 2032^2 + 40706^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15416 + ... + 59664.

It is an arithmetic number, because the mean of its divisors is an integer number (145427625).

Almost surely, 2^1661107460 is an apocalyptic number.

1661107460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1661107460 is an abundant number, since it is smaller than the sum of its proper divisors (1829155540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661107460 is a wasteful number, since it uses less digits than its factorization.

1661107460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46135 (or 46133 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1661107460 is about 40756.6860772561. The cubic root of 1661107460 is about 1184.3113994432.

The spelling of 1661107460 in words is "one billion, six hundred sixty-one million, one hundred seven thousand, four hundred sixty".