1661500610 has 128 divisors (see below), whose sum is σ = 3984422400. Its totient is φ = 486942720.

The previous prime is 1661500609. The next prime is 1661500637. The reversal of 1661500610 is 160051661.

It is a self number, because there is not a number n which added to its sum of digits gives 1661500610.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1583366 + ... + 1584414.

It is an arithmetic number, because the mean of its divisors is an integer number (31128300).

Almost surely, 2^1661500610 is an apocalyptic number.

1661500610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661500610 is an abundant number, since it is smaller than the sum of its proper divisors (2322921790).

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

1661500610 is a wasteful number, since it uses less digits than its factorization.

1661500610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1661500610 is about 40761.5089269276. The cubic root of 1661500610 is about 1184.4048261298.

The spelling of 1661500610 in words is "one billion, six hundred sixty-one million, five hundred thousand, six hundred ten".