66128041652 has 12 divisors (see below), whose sum is σ = 115726679040. Its totient is φ = 33063276216.

The previous prime is 66128041631. The next prime is 66128041657. The reversal of 66128041652 is 25614082166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66128041657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45773 + ... + 366539.

It is an arithmetic number, because the mean of its divisors is an integer number (9643889920).

Almost surely, 2^66128041652 is an apocalyptic number.

It is an amenable number.

66128041652 is a deficient number, since it is larger than the sum of its proper divisors (49598637388).

66128041652 is a wasteful number, since it uses less digits than its factorization.

66128041652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372310 (or 372308 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 66128041652 in words is "sixty-six billion, one hundred twenty-eight million, forty-one thousand, six hundred fifty-two".