66028600561 has 8 divisors (see below), whose sum is σ = 82321372224. Its totient is φ = 51450857520.

The previous prime is 66028600543. The next prime is 66028600619. The reversal of 66028600561 is 16500682066.

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

It is a cyclic number.

It is not a de Polignac number, because 66028600561 - 2¹³ = 66028592369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66028600061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428757070 + ... + 428757223.

It is an arithmetic number, because the mean of its divisors is an integer number (10290171528).

Almost surely, 2^66028600561 is an apocalyptic number.

It is an amenable number.

66028600561 is a deficient number, since it is larger than the sum of its proper divisors (16292771663).

66028600561 is a wasteful number, since it uses less digits than its factorization.

66028600561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857514311.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 66028600561 in words is "sixty-six billion, twenty-eight million, six hundred thousand, five hundred sixty-one".