1966850820 has 144 divisors (see below), whose sum is σ = 6528150720. Its totient is φ = 475372800.

The previous prime is 1966850777. The next prime is 1966850833. The reversal of 1966850820 is 280586691.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 749110 + ... + 751730.

It is an arithmetic number, because the mean of its divisors is an integer number (45334380).

Almost surely, 2^1966850820 is an apocalyptic number.

1966850820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1966850820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3264075360).

1966850820 is an abundant number, since it is smaller than the sum of its proper divisors (4561299900).

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

1966850820 is a wasteful number, since it uses less digits than its factorization.

1966850820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026 (or 3021 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1966850820 is about 44349.1918753882. The cubic root of 1966850820 is about 1252.9213422223.

The spelling of 1966850820 in words is "one billion, nine hundred sixty-six million, eight hundred fifty thousand, eight hundred twenty".