1566420220 has 48 divisors (see below), whose sum is σ = 3364347168. Its totient is φ = 612437760.

The previous prime is 1566420209. The next prime is 1566420253. The reversal of 1566420220 is 220246651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194922 + ... + 202798.

It is an arithmetic number, because the mean of its divisors is an integer number (70090566).

Almost surely, 2^1566420220 is an apocalyptic number.

1566420220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1566420220 is an abundant number, since it is smaller than the sum of its proper divisors (1797926948).

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

1566420220 is a wasteful number, since it uses less digits than its factorization.

1566420220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8110 (or 8108 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1566420220 is about 39578.0269846793. The cubic root of 1566420220 is about 1161.3668538938.

Adding to 1566420220 its reverse (220246651), we get a palindrome (1786666871).

The spelling of 1566420220 in words is "one billion, five hundred sixty-six million, four hundred twenty thousand, two hundred twenty".