1661506882 has 8 divisors (see below), whose sum is σ = 2848297536. Its totient is φ = 712074372.

The previous prime is 1661506879. The next prime is 1661506901. The reversal of 1661506882 is 2886051661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59339518 + ... + 59339545.

It is an arithmetic number, because the mean of its divisors is an integer number (356037192).

Almost surely, 2^1661506882 is an apocalyptic number.

1661506882 is a deficient number, since it is larger than the sum of its proper divisors (1186790654).

1661506882 is a wasteful number, since it uses less digits than its factorization.

1661506882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118679072.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 1661506882 is about 40761.5858621816. The cubic root of 1661506882 is about 1184.4063164648.

The spelling of 1661506882 in words is "one billion, six hundred sixty-one million, five hundred six thousand, eight hundred eighty-two".