66712341250 has 40 divisors (see below), whose sum is σ = 128425312620. Its totient is φ = 25963704000.

The previous prime is 66712341197. The next prime is 66712341259. The reversal of 66712341250 is 5214321766.

It can be written as a sum of positive squares in 10 ways, for example, as 4597246809 + 62115094441 = 67803^2 + 249229^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (66712341259) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 674965 + ... + 767464.

Almost surely, 2^66712341250 is an apocalyptic number.

66712341250 is a deficient number, since it is larger than the sum of its proper divisors (61712971370).

66712341250 is a wasteful number, since it uses less digits than its factorization.

66712341250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442488 (or 1442473 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 66712341250 in words is "sixty-six billion, seven hundred twelve million, three hundred forty-one thousand, two hundred fifty".