665234511552 has 672 divisors, whose sum is σ = 2322169274880. Its totient is φ = 179972997120.

The previous prime is 665234511541. The next prime is 665234511589. The reversal of 665234511552 is 255115432566.

665234511552 is a `hidden beast` number, since 6 + 6 + 52 + 3 + 45 + 1 + 1 + 552 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 665234511498 and 665234511507.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 114436198 + ... + 114442010.

It is an arithmetic number, because the mean of its divisors is an integer number (3455609040).

Almost surely, 2^665234511552 is an apocalyptic number.

665234511552 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665234511552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161084637440).

665234511552 is an abundant number, since it is smaller than the sum of its proper divisors (1656934763328).

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

665234511552 is a wasteful number, since it uses less digits than its factorization.

665234511552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921 (or 5908 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The spelling of 665234511552 in words is "six hundred sixty-five billion, two hundred thirty-four million, five hundred eleven thousand, five hundred fifty-two".