66247029 has 12 divisors (see below), whose sum is σ = 97312800. Its totient is φ = 43415784.

The previous prime is 66247019. The next prime is 66247033. The reversal of 66247029 is 92074266.

It is a happy number.

66247029 is a `hidden beast` number, since 6 + 624 + 7 + 0 + 29 = 666.

It is not a de Polignac number, because 66247029 - 2⁵ = 66246997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66246984 and 66247002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66247019) 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 11 ways as a sum of consecutive naturals, for example, 61849 + ... + 62910.

It is an arithmetic number, because the mean of its divisors is an integer number (8109400).

Almost surely, 2^66247029 is an apocalyptic number.

It is an amenable number.

66247029 is a deficient number, since it is larger than the sum of its proper divisors (31065771).

66247029 is a wasteful number, since it uses less digits than its factorization.

66247029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124824 (or 124821 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 66247029 is about 8139.2277889245. The cubic root of 66247029 is about 404.6275680015.

The spelling of 66247029 in words is "sixty-six million, two hundred forty-seven thousand, twenty-nine".