6642750 has 64 divisors (see below), whose sum is σ = 17589312. Its totient is φ = 1664000.

The previous prime is 6642709. The next prime is 6642763. The reversal of 6642750 is 572466.

It is a super-2 number, since 2×6642750² = 88252255125000, which contains 22 as substring.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12490 + ... + 13010.

It is an arithmetic number, because the mean of its divisors is an integer number (274833).

Almost surely, 2^6642750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6642750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8794656).

6642750 is an abundant number, since it is smaller than the sum of its proper divisors (10946562).

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

6642750 is a wasteful number, since it uses less digits than its factorization.

6642750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 6642750 is about 2577.3532935940. The cubic root of 6642750 is about 187.9818716487.

It can be divided in two parts, 66 and 42750, that multiplied together give a triangular number (2821500 = T₂₃₇₅).

The spelling of 6642750 in words is "six million, six hundred forty-two thousand, seven hundred fifty".