1966863220 has 24 divisors (see below), whose sum is σ = 4720472064. Its totient is φ = 674353056.

The previous prime is 1966863211. The next prime is 1966863257. The reversal of 1966863220 is 223686691.

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, 7024372 + ... + 7024651.

It is an arithmetic number, because the mean of its divisors is an integer number (196686336).

Almost surely, 2^1966863220 is an apocalyptic number.

1966863220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1966863220 is an abundant number, since it is smaller than the sum of its proper divisors (2753608844).

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

1966863220 is a wasteful number, since it uses less digits than its factorization.

1966863220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14049039 (or 14049037 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 1966863220 is about 44349.3316747840. The cubic root of 1966863220 is about 1252.9239752287.

The spelling of 1966863220 in words is "one billion, nine hundred sixty-six million, eight hundred sixty-three thousand, two hundred twenty".