1661430016 has 36 divisors (see below), whose sum is σ = 3319456000. Its totient is φ = 829942272.

The previous prime is 1661430011. The next prime is 1661430031. The reversal of 1661430016 is 6100341661.

It is not an unprimeable number, because it can be changed into a prime (1661430011) by changing a digit.

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, 355825 + ... + 360463.

Almost surely, 2^1661430016 is an apocalyptic number.

1661430016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1661430016 is a deficient number, since it is larger than the sum of its proper divisors (1658025984).

1661430016 is an equidigital number, since it uses as much as digits as its factorization.

1661430016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6054 (or 6040 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1661430016 is about 40760.6429782456. The cubic root of 1661430016 is about 1184.3880515229.

Adding to 1661430016 its reverse (6100341661), we get a palindrome (7761771677).

The spelling of 1661430016 in words is "one billion, six hundred sixty-one million, four hundred thirty thousand, sixteen".