1661832868 has 24 divisors (see below), whose sum is σ = 2983933568. Its totient is φ = 809385696.

The previous prime is 1661832863. The next prime is 1661832877. The reversal of 1661832868 is 8682381661.

It is not an unprimeable number, because it can be changed into a prime (1661832863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51205 + ... + 77107.

Almost surely, 2^1661832868 is an apocalyptic number.

It is an amenable number.

1661832868 is a deficient number, since it is larger than the sum of its proper divisors (1322100700).

1661832868 is a wasteful number, since it uses less digits than its factorization.

1661832868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26323 (or 26321 counting only the distinct ones).

The product of its digits is 663552, while the sum is 49.

The square root of 1661832868 is about 40765.5843573964. The cubic root of 1661832868 is about 1184.4837711805.

The spelling of 1661832868 in words is "one billion, six hundred sixty-one million, eight hundred thirty-two thousand, eight hundred sixty-eight".