66984537 has 8 divisors (see below), whose sum is σ = 89351136. Its totient is φ = 44637152.

The previous prime is 66984509. The next prime is 66984553. The reversal of 66984537 is 73548966.

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 66984537 - 2⁷ = 66984409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66983537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9013 + ... + 14669.

It is an arithmetic number, because the mean of its divisors is an integer number (11168892).

Almost surely, 2^66984537 is an apocalyptic number.

It is an amenable number.

66984537 is a deficient number, since it is larger than the sum of its proper divisors (22366599).

66984537 is a wasteful number, since it uses less digits than its factorization.

66984537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9607.

The product of its digits is 1088640, while the sum is 48.

The square root of 66984537 is about 8184.4081643085. The cubic root of 66984537 is about 406.1235620095.

The spelling of 66984537 in words is "sixty-six million, nine hundred eighty-four thousand, five hundred thirty-seven".