1616223666 has 8 divisors (see below), whose sum is σ = 3232447344. Its totient is φ = 538741220.

The previous prime is 1616223641. The next prime is 1616223689. The reversal of 1616223666 is 6663226161.

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

1616223666 is an admirable number.

It is a super-2 number, since 2×1616223666² = 5224357877076959112, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134685300 + ... + 134685311.

It is an arithmetic number, because the mean of its divisors is an integer number (404055918).

Almost surely, 2^1616223666 is an apocalyptic number.

1616223666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1616223666 is a wasteful number, since it uses less digits than its factorization.

1616223666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269370616.

The product of its digits is 93312, while the sum is 39.

The square root of 1616223666 is about 40202.2843380821. The cubic root of 1616223666 is about 1173.5469991361.

The spelling of 1616223666 in words is "one billion, six hundred sixteen million, two hundred twenty-three thousand, six hundred sixty-six".