6138660078 has 24 divisors (see below), whose sum is σ = 13388518416. Its totient is φ = 2032668000.

The previous prime is 6138660053. The next prime is 6138660079. The reversal of 6138660078 is 8700668316.

6138660078 is a `hidden beast` number, since 6 + 1 + 38 + 6 + 600 + 7 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6138660079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1126543 + ... + 1131978.

It is an arithmetic number, because the mean of its divisors is an integer number (557854934).

Almost surely, 2^6138660078 is an apocalyptic number.

6138660078 is an abundant number, since it is smaller than the sum of its proper divisors (7249858338).

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

6138660078 is a wasteful number, since it uses less digits than its factorization.

6138660078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258680 (or 2258677 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 6138660078 is about 78349.6016454455. The cubic root of 6138660078 is about 1831.0120192898.

The spelling of 6138660078 in words is "six billion, one hundred thirty-eight million, six hundred sixty thousand, seventy-eight".