78566910133 has 8 divisors (see below), whose sum is σ = 83191254552. Its totient is φ = 73942872576.

The previous prime is 78566910131. The next prime is 78566910161. The reversal of 78566910133 is 33101966587.

It can be written as a sum of positive squares in 4 ways, for example, as 6271531249 + 72295378884 = 79193^2 + 268878^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 78566910133 - 2¹ = 78566910131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78566910131) 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, 643891 + ... + 756127.

It is an arithmetic number, because the mean of its divisors is an integer number (10398906819).

Almost surely, 2^78566910133 is an apocalyptic number.

It is an amenable number.

78566910133 is a deficient number, since it is larger than the sum of its proper divisors (4624344419).

78566910133 is a wasteful number, since it uses less digits than its factorization.

78566910133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153431.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 78566910133 in words is "seventy-eight billion, five hundred sixty-six million, nine hundred ten thousand, one hundred thirty-three".