66157064854 has 8 divisors (see below), whose sum is σ = 99237522240. Its totient is φ = 33077890776.

The previous prime is 66157064851. The next prime is 66157064861. The reversal of 66157064854 is 45846075166.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66157064851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179494 + ... + 405625.

It is an arithmetic number, because the mean of its divisors is an integer number (12404690280).

Almost surely, 2^66157064854 is an apocalyptic number.

66157064854 is a deficient number, since it is larger than the sum of its proper divisors (33080457386).

66157064854 is a wasteful number, since it uses less digits than its factorization.

66157064854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641654.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 66157064854 in words is "sixty-six billion, one hundred fifty-seven million, sixty-four thousand, eight hundred fifty-four".