1661430014 has 4 divisors (see below), whose sum is σ = 2492145024. Its totient is φ = 830715006.

The previous prime is 1661430011. The next prime is 1661430031. The reversal of 1661430014 is 4100341661.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415357502 + ... + 415357505.

It is an arithmetic number, because the mean of its divisors is an integer number (623036256).

Almost surely, 2^1661430014 is an apocalyptic number.

1661430014 is a deficient number, since it is larger than the sum of its proper divisors (830715010).

1661430014 is an equidigital number, since it uses as much as digits as its factorization.

1661430014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830715009.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1661430014 is about 40760.6429537121. The cubic root of 1661430014 is about 1184.3880510477.

Adding to 1661430014 its reverse (4100341661), we get a palindrome (5761771675).

The spelling of 1661430014 in words is "one billion, six hundred sixty-one million, four hundred thirty thousand, fourteen".