665581143370 has 32 divisors (see below), whose sum is σ = 1407494672640. Its totient is φ = 223411851840.

The previous prime is 665581143349. The next prime is 665581143379. The reversal of 665581143370 is 73341185566.

It is not an unprimeable number, because it can be changed into a prime (665581143379) 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, 232719250 + ... + 232722109.

It is an arithmetic number, because the mean of its divisors is an integer number (43984208520).

Almost surely, 2^665581143370 is an apocalyptic number.

665581143370 is an abundant number, since it is smaller than the sum of its proper divisors (741913529270).

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

665581143370 is a wasteful number, since it uses less digits than its factorization.

665581143370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465441390.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 665581143370 in words is "six hundred sixty-five billion, five hundred eighty-one million, one hundred forty-three thousand, three hundred seventy".