1661654982 has 48 divisors (see below), whose sum is σ = 3614967360. Its totient is φ = 508955616.

The previous prime is 1661654971. The next prime is 1661654983. The reversal of 1661654982 is 2894561661.

1661654982 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1661654982² = 5522194558410840648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661654983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 226569 + ... + 233787.

It is an arithmetic number, because the mean of its divisors is an integer number (75311820).

Almost surely, 2^1661654982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1661654982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1807483680).

1661654982 is an abundant number, since it is smaller than the sum of its proper divisors (1953312378).

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

1661654982 is a wasteful number, since it uses less digits than its factorization.

1661654982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7477 (or 7464 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 1661654982 is about 40763.4024831098. The cubic root of 1661654982 is about 1184.4415064814.

The spelling of 1661654982 in words is "one billion, six hundred sixty-one million, six hundred fifty-four thousand, nine hundred eighty-two".