80665444456608 has 96 divisors (see below), whose sum is σ = 231132465446400. Its totient is φ = 24429686204160.

The previous prime is 80665444456577. The next prime is 80665444456633.

It is a happy number.

80665444456608 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×80665444456608² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (66).

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, 20686060 + ... + 24274347.

It is an arithmetic number, because the mean of its divisors is an integer number (2407629848400).

Almost surely, 2^{80665444456608} is an apocalyptic number.

80665444456608 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

80665444456608 is an abundant number, since it is smaller than the sum of its proper divisors (150467020989792).

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

80665444456608 is a wasteful number, since it uses less digits than its factorization.

80665444456608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44962130 (or 44962122 counting only the distinct ones).

The product of its (nonzero) digits is 530841600, while the sum is 66.

The spelling of 80665444456608 in words is "eighty trillion, six hundred sixty-five billion, four hundred forty-four million, four hundred fifty-six thousand, six hundred eight".