19661662 has 8 divisors (see below), whose sum is σ = 29550456. Its totient is φ = 9811512.

The previous prime is 19661647. The next prime is 19661671. The reversal of 19661662 is 26616691.

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

It is a congruent number.

It is an unprimeable number.

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, 8353 + ... + 10444.

It is an arithmetic number, because the mean of its divisors is an integer number (3693807).

Almost surely, 2^19661662 is an apocalyptic number.

19661662 is a deficient number, since it is larger than the sum of its proper divisors (9888794).

19661662 is a wasteful number, since it uses less digits than its factorization.

19661662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19322.

The product of its digits is 23328, while the sum is 37.

The square root of 19661662 is about 4434.1472686414. The cubic root of 19661662 is about 269.9023972777.

The spelling of 19661662 in words is "nineteen million, six hundred sixty-one thousand, six hundred sixty-two".