665254166352 has 80 divisors (see below), whose sum is σ = 1730715209280. Its totient is φ = 220187206656.

The previous prime is 665254166341. The next prime is 665254166371. The reversal of 665254166352 is 253661452566.

It is a junction number, because it is equal to n+sod(n) for n = 665254166295 and 665254166304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8544174 + ... + 8621682.

It is an arithmetic number, because the mean of its divisors is an integer number (21633940116).

Almost surely, 2^665254166352 is an apocalyptic number.

It is an amenable number.

665254166352 is an abundant number, since it is smaller than the sum of its proper divisors (1065461042928).

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

665254166352 is a wasteful number, since it uses less digits than its factorization.

665254166352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78780 (or 78774 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 51.

The spelling of 665254166352 in words is "six hundred sixty-five billion, two hundred fifty-four million, one hundred sixty-six thousand, three hundred fifty-two".