1566921648 has 40 divisors (see below), whose sum is σ = 4049338048. Its totient is φ = 522119232.

The previous prime is 1566921623. The next prime is 1566921679. The reversal of 1566921648 is 8461296651.

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

It is a junction number, because it is equal to n+sod(n) for n = 1566921597 and 1566921606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212715 + ... + 219957.

Almost surely, 2^1566921648 is an apocalyptic number.

It is an amenable number.

1566921648 is an abundant number, since it is smaller than the sum of its proper divisors (2482416400).

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

1566921648 is a wasteful number, since it uses less digits than its factorization.

1566921648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11761 (or 11755 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 1566921648 is about 39584.3611543751. The cubic root of 1566921648 is about 1161.4907626901.

The spelling of 1566921648 in words is "one billion, five hundred sixty-six million, nine hundred twenty-one thousand, six hundred forty-eight".