66188295146 has 4 divisors (see below), whose sum is σ = 99282442722. Its totient is φ = 33094147572.

The previous prime is 66188295143. The next prime is 66188295157. The reversal of 66188295146 is 64159288166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 52423139521 + 13765155625 = 228961^2 + 117325^2 .

It is a super-2 number, since 2×66188295146² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66188295091 and 66188295100.

It is not an unprimeable number, because it can be changed into a prime (66188295143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16547073785 + ... + 16547073788.

Almost surely, 2^66188295146 is an apocalyptic number.

66188295146 is a deficient number, since it is larger than the sum of its proper divisors (33094147576).

66188295146 is a wasteful number, since it uses less digits than its factorization.

66188295146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33094147575.

The product of its digits is 4976640, while the sum is 56.

The spelling of 66188295146 in words is "sixty-six billion, one hundred eighty-eight million, two hundred ninety-five thousand, one hundred forty-six".