1566366420 has 24 divisors (see below), whose sum is σ = 4385826144. Its totient is φ = 417697696.

The previous prime is 1566366413. The next prime is 1566366433. The reversal of 1566366420 is 246636651.

It is a congruent number.

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, 13052994 + ... + 13053113.

It is an arithmetic number, because the mean of its divisors is an integer number (182742756).

Almost surely, 2^1566366420 is an apocalyptic number.

1566366420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1566366420 is an abundant number, since it is smaller than the sum of its proper divisors (2819459724).

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

1566366420 is a wasteful number, since it uses less digits than its factorization.

1566366420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26106119 (or 26106117 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 1566366420 is about 39577.3473087826. The cubic root of 1566366420 is about 1161.3535577061.

The spelling of 1566366420 in words is "one billion, five hundred sixty-six million, three hundred sixty-six thousand, four hundred twenty".