66216705146 has 8 divisors (see below), whose sum is σ = 99490325844. Its totient is φ = 33053263200.

The previous prime is 66216705143. The next prime is 66216705161. The reversal of 66216705146 is 64150761266.

It can be written as a sum of positive squares in 2 ways, for example, as 65472015625 + 744689521 = 255875^2 + 27289^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 66216705097 and 66216705106.

It is not an unprimeable number, because it can be changed into a prime (66216705143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27543185 + ... + 27545588.

Almost surely, 2^66216705146 is an apocalyptic number.

66216705146 is a deficient number, since it is larger than the sum of its proper divisors (33273620698).

66216705146 is a wasteful number, since it uses less digits than its factorization.

66216705146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55089376.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 66216705146 in words is "sixty-six billion, two hundred sixteen million, seven hundred five thousand, one hundred forty-six".