78266711798 has 8 divisors (see below), whose sum is σ = 128072801160. Its totient is φ = 35575778080.

The previous prime is 78266711797. The next prime is 78266711807. The reversal of 78266711798 is 89711766287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78266711798² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78266711798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78266711797) 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, 1778788883 + ... + 1778788926.

It is an arithmetic number, because the mean of its divisors is an integer number (16009100145).

Almost surely, 2^78266711798 is an apocalyptic number.

78266711798 is a deficient number, since it is larger than the sum of its proper divisors (49806089362).

78266711798 is a wasteful number, since it uses less digits than its factorization.

78266711798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557577822.

The product of its digits is 14224896, while the sum is 62.

The spelling of 78266711798 in words is "seventy-eight billion, two hundred sixty-six million, seven hundred eleven thousand, seven hundred ninety-eight".