1566765552 has 40 divisors (see below), whose sum is σ = 4415431680. Its totient is φ = 474777280.

The previous prime is 1566765533. The next prime is 1566765553. The reversal of 1566765552 is 2555676651.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566765553) 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 7 ways as a sum of consecutive naturals, for example, 1483152 + ... + 1484207.

It is an arithmetic number, because the mean of its divisors is an integer number (110385792).

Almost surely, 2^1566765552 is an apocalyptic number.

1566765552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1566765552 is an abundant number, since it is smaller than the sum of its proper divisors (2848666128).

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

1566765552 is a wasteful number, since it uses less digits than its factorization.

1566765552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967381 (or 2967375 counting only the distinct ones).

The product of its digits is 1890000, while the sum is 48.

The square root of 1566765552 is about 39582.3894175175. The cubic root of 1566765552 is about 1161.4521923542.

The spelling of 1566765552 in words is "one billion, five hundred sixty-six million, seven hundred sixty-five thousand, five hundred fifty-two".