78660557588906 has 8 divisors (see below), whose sum is σ = 117990874167204. Its totient is φ = 39330266199840.

The previous prime is 78660557588891. The next prime is 78660557588933. The reversal of 78660557588906 is 60988575506687.

It can be written as a sum of positive squares in 2 ways, for example, as 74104292308225 + 4556265280681 = 8608385^2 + 2134541^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8018996 + ... + 14887088.

Almost surely, 2^{78660557588906} is an apocalyptic number.

78660557588906 is a deficient number, since it is larger than the sum of its proper divisors (39330316578298).

78660557588906 is a wasteful number, since it uses less digits than its factorization.

78660557588906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12594616.

The product of its (nonzero) digits is 6096384000, while the sum is 80.

The spelling of 78660557588906 in words is "seventy-eight trillion, six hundred sixty billion, five hundred fifty-seven million, five hundred eighty-eight thousand, nine hundred six".