1661750132 has 18 divisors (see below), whose sum is σ = 3382848882. Its totient is φ = 712178544.

The previous prime is 1661750117. The next prime is 1661750149. The reversal of 1661750132 is 2310571661.

It can be written as a sum of positive squares in only one way, i.e., 892575376 + 769174756 = 29876^2 + 27734^2 .

It is a super-2 number, since 2×1661750132² = 5522827002404034848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4238963 + ... + 4239354.

It is an arithmetic number, because the mean of its divisors is an integer number (187936049).

Almost surely, 2^1661750132 is an apocalyptic number.

It is an amenable number.

1661750132 is an abundant number, since it is smaller than the sum of its proper divisors (1721098750).

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

1661750132 is a wasteful number, since it uses less digits than its factorization.

1661750132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8478335 (or 8478326 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1661750132 is about 40764.5695672112. The cubic root of 1661750132 is about 1184.4641139539.

The spelling of 1661750132 in words is "one billion, six hundred sixty-one million, seven hundred fifty thousand, one hundred thirty-two".