66528433 has 4 divisors (see below), whose sum is σ = 67014180. Its totient is φ = 66042688.

The previous prime is 66528431. The next prime is 66528461. The reversal of 66528433 is 33482566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49322529 + 17205904 = 7023^2 + 4148^2 .

It is a cyclic number.

It is not a de Polignac number, because 66528433 - 2¹ = 66528431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66528392 and 66528401.

It is not an unprimeable number, because it can be changed into a prime (66528431) 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, 242668 + ... + 242941.

It is an arithmetic number, because the mean of its divisors is an integer number (16753545).

Almost surely, 2^66528433 is an apocalyptic number.

It is an amenable number.

66528433 is a deficient number, since it is larger than the sum of its proper divisors (485747).

66528433 is a wasteful number, since it uses less digits than its factorization.

66528433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485746.

The product of its digits is 103680, while the sum is 37.

The square root of 66528433 is about 8156.4963679266. The cubic root of 66528433 is about 405.1996840836.

The spelling of 66528433 in words is "sixty-six million, five hundred twenty-eight thousand, four hundred thirty-three".