78066351172523 has 16 divisors (see below), whose sum is σ = 89715514097664. Its totient is φ = 66541427203680.

The previous prime is 78066351172507. The next prime is 78066351172541. The reversal of 78066351172523 is 32527115366087.

It is a cyclic number.

It is not a de Polignac number, because 78066351172523 - 2⁴ = 78066351172507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78066351172583) 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, 28022786 + ... + 30682392.

It is an arithmetic number, because the mean of its divisors is an integer number (5607219631104).

Almost surely, 2^{78066351172523} is an apocalyptic number.

78066351172523 is a deficient number, since it is larger than the sum of its proper divisors (11649162925141).

78066351172523 is a wasteful number, since it uses less digits than its factorization.

78066351172523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2682962.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 78066351172523 in words is "seventy-eight trillion, sixty-six billion, three hundred fifty-one million, one hundred seventy-two thousand, five hundred twenty-three".