66260587738 has 8 divisors (see below), whose sum is σ = 99413194932. Its totient is φ = 33122856096.

The previous prime is 66260587709. The next prime is 66260587747. The reversal of 66260587738 is 83778506266.

It can be written as a sum of positive squares in 2 ways, for example, as 62173926409 + 4086661329 = 249347^2 + 63927^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3707745 + ... + 3725572.

Almost surely, 2^66260587738 is an apocalyptic number.

66260587738 is a deficient number, since it is larger than the sum of its proper divisors (33152607194).

66260587738 is a wasteful number, since it uses less digits than its factorization.

66260587738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7437776.

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 66260587738 in words is "sixty-six billion, two hundred sixty million, five hundred eighty-seven thousand, seven hundred thirty-eight".