1566100006221 has 8 divisors (see below), whose sum is σ = 2098029709024. Its totient is φ = 1039118487120.

The previous prime is 1566100006217. The next prime is 1566100006249. The reversal of 1566100006221 is 1226000016651.

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

It is not a de Polignac number, because 1566100006221 - 2² = 1566100006217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566100006021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1237045186 + ... + 1237046451.

It is an arithmetic number, because the mean of its divisors is an integer number (262253713628).

Almost surely, 2^{1566100006221} is an apocalyptic number.

It is an amenable number.

1566100006221 is a deficient number, since it is larger than the sum of its proper divisors (531929702803).

1566100006221 is a wasteful number, since it uses less digits than its factorization.

1566100006221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474091851.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 1566100006221 in words is "one trillion, five hundred sixty-six billion, one hundred million, six thousand, two hundred twenty-one".