66974547 has 8 divisors (see below), whose sum is σ = 90303120. Its totient is φ = 44147840.

The previous prime is 66974533. The next prime is 66974549. The reversal of 66974547 is 74547966.

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

It is a cyclic number.

It is not a de Polignac number, because 66974547 - 2¹⁴ = 66958163 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66974496 and 66974505.

It is not an unprimeable number, because it can be changed into a prime (66974549) 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, 125154 + ... + 125687.

It is an arithmetic number, because the mean of its divisors is an integer number (11287890).

Almost surely, 2^66974547 is an apocalyptic number.

66974547 is a deficient number, since it is larger than the sum of its proper divisors (23328573).

66974547 is a wasteful number, since it uses less digits than its factorization.

66974547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250933.

The product of its digits is 1270080, while the sum is 48.

The square root of 66974547 is about 8183.7978347464. The cubic root of 66974547 is about 406.1033713990.

The spelling of 66974547 in words is "sixty-six million, nine hundred seventy-four thousand, five hundred forty-seven".