66704067 has 20 divisors (see below), whose sum is σ = 100388376. Its totient is φ = 44137440.

The previous prime is 66704047. The next prime is 66704101. The reversal of 66704067 is 76040766.

It is not a de Polignac number, because 66704067 - 2⁸ = 66703811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66704047) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8092 + ... + 14102.

Almost surely, 2^66704067 is an apocalyptic number.

66704067 is a deficient number, since it is larger than the sum of its proper divisors (33684309).

66704067 is a wasteful number, since it uses less digits than its factorization.

66704067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160 (or 6151 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 66704067 is about 8167.2557814727. The cubic root of 66704067 is about 405.5559443238. Note that the first 3 decimals are identical.

The spelling of 66704067 in words is "sixty-six million, seven hundred four thousand, sixty-seven".