78265813166 has 16 divisors (see below), whose sum is σ = 122979695904. Its totient is φ = 37285822464.

The previous prime is 78265813163. The next prime is 78265813201. The reversal of 78265813166 is 66131856287.

It is a super-2 number, since 2×78265813166² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78265813163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3298355 + ... + 3321998.

It is an arithmetic number, because the mean of its divisors is an integer number (7686230994).

Almost surely, 2^78265813166 is an apocalyptic number.

78265813166 is a deficient number, since it is larger than the sum of its proper divisors (44713882738).

78265813166 is a wasteful number, since it uses less digits than its factorization.

78265813166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620635.

The product of its digits is 2903040, while the sum is 53.

The spelling of 78265813166 in words is "seventy-eight billion, two hundred sixty-five million, eight hundred thirteen thousand, one hundred sixty-six".