66673667 has 8 divisors (see below), whose sum is σ = 70147392. Its totient is φ = 63288000.

The previous prime is 66673657. The next prime is 66673687. The reversal of 66673667 is 76637666.

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 66673667 - 2¹⁶ = 66608131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66673657) 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, 20459 + ... + 23492.

It is an arithmetic number, because the mean of its divisors is an integer number (8768424).

Almost surely, 2^66673667 is an apocalyptic number.

66673667 is a deficient number, since it is larger than the sum of its proper divisors (3473725).

66673667 is a wasteful number, since it uses less digits than its factorization.

66673667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44029.

The product of its digits is 1143072, while the sum is 47.

The square root of 66673667 is about 8165.3944791418. The cubic root of 66673667 is about 405.4943250220.

The spelling of 66673667 in words is "sixty-six million, six hundred seventy-three thousand, six hundred sixty-seven".