66045143240 has 32 divisors (see below), whose sum is σ = 149138065080. Its totient is φ = 26322680832.

The previous prime is 66045143233. The next prime is 66045143251. The reversal of 66045143240 is 4234154066.

It can be written as a sum of positive squares in 4 ways, for example, as 42101294596 + 23943848644 = 205186^2 + 154738^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66045143240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2969297 + ... + 2991456.

Almost surely, 2^66045143240 is an apocalyptic number.

It is an amenable number.

66045143240 is an abundant number, since it is smaller than the sum of its proper divisors (83092921840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66045143240 is a wasteful number, since it uses less digits than its factorization.

66045143240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5961041 (or 5961037 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 66045143240 in words is "sixty-six billion, forty-five million, one hundred forty-three thousand, two hundred forty".