665470028190 has 256 divisors, whose sum is σ = 1798937247744. Its totient is φ = 156170073600.

The previous prime is 665470028123. The next prime is 665470028191. The reversal of 665470028190 is 91820074566.

It is a super-2 number, since 2×665470028190² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665470028191) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 626029599 + ... + 626030661.

It is an arithmetic number, because the mean of its divisors is an integer number (7027098624).

Almost surely, 2^665470028190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665470028190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (899468623872).

665470028190 is an abundant number, since it is smaller than the sum of its proper divisors (1133467219554).

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

665470028190 is a wasteful number, since it uses less digits than its factorization.

665470028190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 665470028190 in words is "six hundred sixty-five billion, four hundred seventy million, twenty-eight thousand, one hundred ninety".