66433541928397 has 16 divisors (see below), whose sum is σ = 75957037195392. Its totient is φ = 56918295783360.

The previous prime is 66433541928389. The next prime is 66433541928407. The reversal of 66433541928397 is 79382914533466.

It is a cyclic number.

It is not a de Polignac number, because 66433541928397 - 2³ = 66433541928389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66433541928317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577038283 + ... + 577153399.

It is an arithmetic number, because the mean of its divisors is an integer number (4747314824712).

Almost surely, 2^{66433541928397} is an apocalyptic number.

It is an amenable number.

66433541928397 is a deficient number, since it is larger than the sum of its proper divisors (9523495266995).

66433541928397 is a wasteful number, since it uses less digits than its factorization.

66433541928397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150228.

The product of its digits is 705438720, while the sum is 70.

The spelling of 66433541928397 in words is "sixty-six trillion, four hundred thirty-three billion, five hundred forty-one million, nine hundred twenty-eight thousand, three hundred ninety-seven".