66900067 has 4 divisors (see below), whose sum is σ = 72046240. Its totient is φ = 61753896.

The previous prime is 66900059. The next prime is 66900089. The reversal of 66900067 is 76000966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66900067 - 2³ = 66900059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66900017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2573067 + ... + 2573092.

It is an arithmetic number, because the mean of its divisors is an integer number (18011560).

Almost surely, 2^66900067 is an apocalyptic number.

66900067 is a deficient number, since it is larger than the sum of its proper divisors (5146173).

66900067 is a wasteful number, since it uses less digits than its factorization.

66900067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146172.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 66900067 is about 8179.2461144044. The cubic root of 66900067 is about 405.9527778803.

The spelling of 66900067 in words is "sixty-six million, nine hundred thousand, sixty-seven".