1566551100066 has 16 divisors (see below), whose sum is σ = 3133140628800. Its totient is φ = 522177295248.

The previous prime is 1566551100013. The next prime is 1566551100067. The reversal of 1566551100066 is 6600011556651.

It is a super-3 number, since 3×1566551100066³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1566551100067) 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, 1057021 + ... + 2061648.

It is an arithmetic number, because the mean of its divisors is an integer number (195821289300).

Almost surely, 2^{1566551100066} is an apocalyptic number.

1566551100066 is an abundant number, since it is smaller than the sum of its proper divisors (1566589528734).

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

1566551100066 is a wasteful number, since it uses less digits than its factorization.

1566551100066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202393.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 1566551100066 in words is "one trillion, five hundred sixty-six billion, five hundred fifty-one million, one hundred thousand, sixty-six".