1620666503223 has 8 divisors (see below), whose sum is σ = 2287999769328. Its totient is φ = 1016888786304.

The previous prime is 1620666503221. The next prime is 1620666503249. The reversal of 1620666503223 is 3223056660261.

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

It is not a de Polignac number, because 1620666503223 - 2¹ = 1620666503221 is a prime.

It is a super-3 number, since 3×1620666503223³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620666503221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15888887236 + ... + 15888887337.

It is an arithmetic number, because the mean of its divisors is an integer number (285999971166).

Almost surely, 2^{1620666503223} is an apocalyptic number.

1620666503223 is a deficient number, since it is larger than the sum of its proper divisors (667333266105).

1620666503223 is a wasteful number, since it uses less digits than its factorization.

1620666503223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31777774593.

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 1620666503223 in words is "one trillion, six hundred twenty billion, six hundred sixty-six million, five hundred three thousand, two hundred twenty-three".