2620066440 has 32 divisors (see below), whose sum is σ = 7860199680. Its totient is φ = 698684352.

The previous prime is 2620066439. The next prime is 2620066447. The reversal of 2620066440 is 446600262.

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 = 2620066398 and 2620066407.

It is not an unprimeable number, because it can be changed into a prime (2620066447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10916824 + ... + 10917063.

It is an arithmetic number, because the mean of its divisors is an integer number (245631240).

Almost surely, 2^2620066440 is an apocalyptic number.

2620066440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2620066440 is an abundant number, since it is smaller than the sum of its proper divisors (5240133240).

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

2620066440 is a wasteful number, since it uses less digits than its factorization.

2620066440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21833901 (or 21833897 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 2620066440 is about 51186.5845705689. The cubic root of 2620066440 is about 1378.5973355464.

The spelling of 2620066440 in words is "two billion, six hundred twenty million, sixty-six thousand, four hundred forty".