66973029 has 8 divisors (see below), whose sum is σ = 89796960. Its totient is φ = 44398896.

The previous prime is 66973019. The next prime is 66973031. The reversal of 66973029 is 92037966.

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

It is not a de Polignac number, because 66973029 - 2¹³ = 66964837 is a prime.

It is a super-2 number, since 2×66973029² = 8970773226869682, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66973009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61822 + ... + 62895.

It is an arithmetic number, because the mean of its divisors is an integer number (11224620).

Almost surely, 2^66973029 is an apocalyptic number.

It is an amenable number.

66973029 is a deficient number, since it is larger than the sum of its proper divisors (22823931).

66973029 is a wasteful number, since it uses less digits than its factorization.

66973029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124899.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 66973029 is about 8183.7050899944. The cubic root of 66973029 is about 406.1003032206.

The spelling of 66973029 in words is "sixty-six million, nine hundred seventy-three thousand, twenty-nine".