66734973 has 12 divisors (see below), whose sum is σ = 101468640. Its totient is φ = 42148296.

The previous prime is 66734963. The next prime is 66734977. The reversal of 66734973 is 37943766.

It is not a de Polignac number, because 66734973 - 2⁹ = 66734461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66734977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194961 + ... + 195302.

It is an arithmetic number, because the mean of its divisors is an integer number (8455720).

Almost surely, 2^66734973 is an apocalyptic number.

It is an amenable number.

66734973 is a deficient number, since it is larger than the sum of its proper divisors (34733667).

66734973 is a wasteful number, since it uses less digits than its factorization.

66734973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390288 (or 390285 counting only the distinct ones).

The product of its digits is 571536, while the sum is 45.

The square root of 66734973 is about 8169.1476299550. The cubic root of 66734973 is about 405.6185700740.

The spelling of 66734973 in words is "sixty-six million, seven hundred thirty-four thousand, nine hundred seventy-three".