6642790 has 32 divisors (see below), whose sum is σ = 14909184. Its totient is φ = 2070240.

The previous prime is 6642763. The next prime is 6642793. The reversal of 6642790 is 972466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642793) 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, 3544 + ... + 5083.

It is an arithmetic number, because the mean of its divisors is an integer number (465912).

Almost surely, 2^6642790 is an apocalyptic number.

6642790 is an abundant number, since it is smaller than the sum of its proper divisors (8266394).

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

6642790 is a wasteful number, since it uses less digits than its factorization.

6642790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8652.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 6642790 is about 2577.3610534809. The cubic root of 6642790 is about 187.9822489653.

It can be divided in two parts, 6642 and 790, that multiplied together give a triangular number (5247180 = T₃₂₃₉).

The spelling of 6642790 in words is "six million, six hundred forty-two thousand, seven hundred ninety".