79166678041667 has 4 divisors (see below), whose sum is σ = 79166696587536. Its totient is φ = 79166659495800.

The previous prime is 79166678041657. The next prime is 79166678041697. The reversal of 79166678041667 is 76614087666197.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79166678041667 - 2⁸ = 79166678041411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79166678041594 and 79166678041603.

It is not an unprimeable number, because it can be changed into a prime (79166678041637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719018 + ... + 12603584.

It is an arithmetic number, because the mean of its divisors is an integer number (19791674146884).

Almost surely, 2^{79166678041667} is an apocalyptic number.

79166678041667 is a deficient number, since it is larger than the sum of its proper divisors (18545869).

79166678041667 is a wasteful number, since it uses less digits than its factorization.

79166678041667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18545868.

The product of its (nonzero) digits is 768144384, while the sum is 74.

The spelling of 79166678041667 in words is "seventy-nine trillion, one hundred sixty-six billion, six hundred seventy-eight million, forty-one thousand, six hundred sixty-seven".