1661614028 has 48 divisors (see below), whose sum is σ = 2997976800. Its totient is φ = 805593600.

The previous prime is 1661613931. The next prime is 1661614039. The reversal of 1661614028 is 8204161661.

It is a super-2 number, since 2×1661614028² = 5521922356092769568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7874843 + ... + 7875053.

It is an arithmetic number, because the mean of its divisors is an integer number (62457850).

Almost surely, 2^1661614028 is an apocalyptic number.

It is an amenable number.

1661614028 is a deficient number, since it is larger than the sum of its proper divisors (1336362772).

1661614028 is a wasteful number, since it uses less digits than its factorization.

1661614028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1661614028 is about 40762.9001421636. The cubic root of 1661614028 is about 1184.4317756173.

Adding to 1661614028 its reverse (8204161661), we get a palindrome (9865775689).

The spelling of 1661614028 in words is "one billion, six hundred sixty-one million, six hundred fourteen thousand, twenty-eight".