1566780852 has 192 divisors, whose sum is σ = 4688144384. Its totient is φ = 396264960.

The previous prime is 1566780811. The next prime is 1566780857. The reversal of 1566780852 is 2580876651.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566780857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2864043 + ... + 2864589.

Almost surely, 2^1566780852 is an apocalyptic number.

1566780852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1566780852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2344072192).

1566780852 is an abundant number, since it is smaller than the sum of its proper divisors (3121363532).

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

1566780852 is a wasteful number, since it uses less digits than its factorization.

1566780852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The square root of 1566780852 is about 39582.5826848123. The cubic root of 1566780852 is about 1161.4559730009.

The spelling of 1566780852 in words is "one billion, five hundred sixty-six million, seven hundred eighty thousand, eight hundred fifty-two".