8101667778 has 16 divisors (see below), whose sum is σ = 16641264000. Its totient is φ = 2627567856.

The previous prime is 8101667771. The next prime is 8101667809. The reversal of 8101667778 is 8777661018.

It is a self number, because there is not a number n which added to its sum of digits gives 8101667778.

It is not an unprimeable number, because it can be changed into a prime (8101667771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18246778 + ... + 18247221.

It is an arithmetic number, because the mean of its divisors is an integer number (1040079000).

Almost surely, 2^8101667778 is an apocalyptic number.

8101667778 is an abundant number, since it is smaller than the sum of its proper divisors (8539596222).

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

8101667778 is a wasteful number, since it uses less digits than its factorization.

8101667778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36494041.

The product of its (nonzero) digits is 790272, while the sum is 51.

The square root of 8101667778 is about 90009.2649564477. The cubic root of 8101667778 is about 2008.4366760402.

The spelling of 8101667778 in words is "eight billion, one hundred one million, six hundred sixty-seven thousand, seven hundred seventy-eight".