2066215440 has 80 divisors (see below), whose sum is σ = 6411196800. Its totient is φ = 550480896.

The previous prime is 2066215423. The next prime is 2066215453. The reversal of 2066215440 is 445126602.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2066215398 and 2066215407.

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, 306021 + ... + 312699.

It is an arithmetic number, because the mean of its divisors is an integer number (80139960).

Almost surely, 2^2066215440 is an apocalyptic number.

2066215440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2066215440 is an abundant number, since it is smaller than the sum of its proper divisors (4344981360).

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

2066215440 is a wasteful number, since it uses less digits than its factorization.

2066215440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7984 (or 7978 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 2066215440 is about 45455.6425540328. The cubic root of 2066215440 is about 1273.6747352306.

The spelling of 2066215440 in words is "two billion, sixty-six million, two hundred fifteen thousand, four hundred forty".