66970033 has 4 divisors (see below), whose sum is σ = 72121588. Its totient is φ = 61818480.

The previous prime is 66969989. The next prime is 66970039. The reversal of 66970033 is 33007966.

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 42289009 + 24681024 = 6503^2 + 4968^2 .

It is a cyclic number.

It is not a de Polignac number, because 66970033 - 2²¹ = 64872881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66970039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2575758 + ... + 2575783.

It is an arithmetic number, because the mean of its divisors is an integer number (18030397).

Almost surely, 2^66970033 is an apocalyptic number.

It is an amenable number.

66970033 is a deficient number, since it is larger than the sum of its proper divisors (5151555).

66970033 is a wasteful number, since it uses less digits than its factorization.

66970033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5151554.

The product of its (nonzero) digits is 20412, while the sum is 34.

The square root of 66970033 is about 8183.5220412729. The cubic root of 66970033 is about 406.0942475757.

Adding to 66970033 its reverse (33007966), we get a palindrome (99977999).

The spelling of 66970033 in words is "sixty-six million, nine hundred seventy thousand, thirty-three".