66398552033 has 16 divisors (see below), whose sum is σ = 74870118720. Its totient is φ = 58366420800.

The previous prime is 66398552029. The next prime is 66398552063. The reversal of 66398552033 is 33025589366.

It is a cyclic number.

It is not a de Polignac number, because 66398552033 - 2² = 66398552029 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66398552023) 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, 799010 + ... + 878187.

It is an arithmetic number, because the mean of its divisors is an integer number (4679382420).

Almost surely, 2^66398552033 is an apocalyptic number.

It is an amenable number.

66398552033 is a deficient number, since it is larger than the sum of its proper divisors (8471566687).

66398552033 is a wasteful number, since it uses less digits than its factorization.

66398552033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677328.

The product of its (nonzero) digits is 3499200, while the sum is 50.

The spelling of 66398552033 in words is "sixty-six billion, three hundred ninety-eight million, five hundred fifty-two thousand, thirty-three".