2750665720 has 64 divisors (see below), whose sum is σ = 7107004800. Its totient is φ = 947594880.

The previous prime is 2750665717. The next prime is 2750665721. The reversal of 2750665720 is 275660572.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2750665721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156154 + ... + 172873.

It is an arithmetic number, because the mean of its divisors is an integer number (111046950).

Almost surely, 2^2750665720 is an apocalyptic number.

2750665720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2750665720 is an abundant number, since it is smaller than the sum of its proper divisors (4356339080).

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

2750665720 is a wasteful number, since it uses less digits than its factorization.

2750665720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329068 (or 329064 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 2750665720 is about 52446.7894155591. The cubic root of 2750665720 is about 1401.1327091532.

The spelling of 2750665720 in words is "two billion, seven hundred fifty million, six hundred sixty-five thousand, seven hundred twenty".