2073661780 has 24 divisors (see below), whose sum is σ = 4394645640. Its totient is φ = 821854080.

The previous prime is 2073661769. The next prime is 2073661783. The reversal of 2073661780 is 871663702.

It can be written as a sum of positive squares in 4 ways, for example, as 40373316 + 2033288464 = 6354^2 + 45092^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2073661783) 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, 473431 + ... + 477790.

It is an arithmetic number, because the mean of its divisors is an integer number (183110235).

Almost surely, 2^2073661780 is an apocalyptic number.

2073661780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2073661780 is an abundant number, since it is smaller than the sum of its proper divisors (2320983860).

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

2073661780 is a wasteful number, since it uses less digits than its factorization.

2073661780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951339 (or 951337 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 2073661780 is about 45537.4766538507. The cubic root of 2073661780 is about 1275.2029470613.

The spelling of 2073661780 in words is "two billion, seventy-three million, six hundred sixty-one thousand, seven hundred eighty".