1661330366 has 8 divisors (see below), whose sum is σ = 2577926520. Its totient is φ = 802021528.

The previous prime is 1661330357. The next prime is 1661330369. The reversal of 1661330366 is 6630331661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661330369) 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 in 3 ways as a sum of consecutive naturals, for example, 14321756 + ... + 14321871.

It is an arithmetic number, because the mean of its divisors is an integer number (322240815).

Almost surely, 2^1661330366 is an apocalyptic number.

1661330366 is a deficient number, since it is larger than the sum of its proper divisors (916596154).

1661330366 is a wasteful number, since it uses less digits than its factorization.

1661330366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28643658.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 1661330366 is about 40759.4205797874. The cubic root of 1661330366 is about 1184.3643717957.

The spelling of 1661330366 in words is "one billion, six hundred sixty-one million, three hundred thirty thousand, three hundred sixty-six".