66745529626 has 4 divisors (see below), whose sum is σ = 100118294442. Its totient is φ = 33372764812.

The previous prime is 66745529593. The next prime is 66745529629. The reversal of 66745529626 is 62692554766.

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., 61739825625 + 5005704001 = 248475^2 + 70751^2 .

It is not an unprimeable number, because it can be changed into a prime (66745529629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16686382405 + ... + 16686382408.

Almost surely, 2^66745529626 is an apocalyptic number.

66745529626 is a deficient number, since it is larger than the sum of its proper divisors (33372764816).

66745529626 is a wasteful number, since it uses less digits than its factorization.

66745529626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33372764815.

The product of its digits is 32659200, while the sum is 58.

The spelling of 66745529626 in words is "sixty-six billion, seven hundred forty-five million, five hundred twenty-nine thousand, six hundred twenty-six".