66385135078 has 8 divisors (see below), whose sum is σ = 99579920472. Its totient is φ = 33191828256.

The previous prime is 66385135051. The next prime is 66385135097. The reversal of 66385135078 is 87053158366.

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

It is a congruent number.

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, 249600 + ... + 441667.

It is an arithmetic number, because the mean of its divisors is an integer number (12447490059).

Almost surely, 2^66385135078 is an apocalyptic number.

66385135078 is a deficient number, since it is larger than the sum of its proper divisors (33194785394).

66385135078 is a wasteful number, since it uses less digits than its factorization.

66385135078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739286.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 66385135078 in words is "sixty-six billion, three hundred eighty-five million, one hundred thirty-five thousand, seventy-eight".