1566651552 has 24 divisors (see below), whose sum is σ = 4112460576. Its totient is φ = 522217152.

The previous prime is 1566651547. The next prime is 1566651571. The reversal of 1566651552 is 2551566651.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8159548 + ... + 8159739.

It is an arithmetic number, because the mean of its divisors is an integer number (171352524).

Almost surely, 2^1566651552 is an apocalyptic number.

1566651552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1566651552 is an abundant number, since it is smaller than the sum of its proper divisors (2545809024).

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

1566651552 is a wasteful number, since it uses less digits than its factorization.

1566651552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16319300 (or 16319292 counting only the distinct ones).

The product of its digits is 270000, while the sum is 42.

The square root of 1566651552 is about 39580.9493569823. The cubic root of 1566651552 is about 1161.4240220554.

The spelling of 1566651552 in words is "one billion, five hundred sixty-six million, six hundred fifty-one thousand, five hundred fifty-two".