1566166004 has 96 divisors (see below), whose sum is σ = 3278048256. Its totient is φ = 647792640.

The previous prime is 1566166003. The next prime is 1566166009. The reversal of 1566166004 is 4006616651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566166001) 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 31 ways as a sum of consecutive naturals, for example, 1835642 + ... + 1836494.

It is an arithmetic number, because the mean of its divisors is an integer number (34146336).

Almost surely, 2^1566166004 is an apocalyptic number.

It is an amenable number.

1566166004 is an abundant number, since it is smaller than the sum of its proper divisors (1711882252).

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

1566166004 is a wasteful number, since it uses less digits than its factorization.

1566166004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1566166004 is about 39574.8152743636. The cubic root of 1566166004 is about 1161.3040240084.

The spelling of 1566166004 in words is "one billion, five hundred sixty-six million, one hundred sixty-six thousand, four".