66045143236 has 6 divisors (see below), whose sum is σ = 115579000670. Its totient is φ = 33022571616.

The previous prime is 66045143233. The next prime is 66045143251. The reversal of 66045143236 is 63234154066.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61961166400 + 4083976836 = 248920^2 + 63906^2 .

It is not an unprimeable number, because it can be changed into a prime (66045143233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8255642901 + ... + 8255642908.

Almost surely, 2^66045143236 is an apocalyptic number.

It is an amenable number.

66045143236 is a deficient number, since it is larger than the sum of its proper divisors (49533857434).

66045143236 is a wasteful number, since it uses less digits than its factorization.

66045143236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16511285813 (or 16511285811 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 66045143236 in words is "sixty-six billion, forty-five million, one hundred forty-three thousand, two hundred thirty-six".