665155416744 has 192 divisors, whose sum is σ = 2313584582400. Its totient is φ = 167798366208.

The previous prime is 665155416743. The next prime is 665155416781. The reversal of 665155416744 is 447614551566.

665155416744 is a `hidden beast` number, since 6 + 6 + 5 + 1 + 554 + 16 + 74 + 4 = 666.

665155416744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (665155416743) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2056249 + ... + 2357640.

It is an arithmetic number, because the mean of its divisors is an integer number (12049919700).

Almost surely, 2^665155416744 is an apocalyptic number.

It is an amenable number.

665155416744 is an abundant number, since it is smaller than the sum of its proper divisors (1648429165656).

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

665155416744 is a wasteful number, since it uses less digits than its factorization.

665155416744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413944 (or 4413937 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 54.

The spelling of 665155416744 in words is "six hundred sixty-five billion, one hundred fifty-five million, four hundred sixteen thousand, seven hundred forty-four".