66684023 has 16 divisors (see below), whose sum is σ = 78388224. Its totient is φ = 55542240.

The previous prime is 66684019. The next prime is 66684029. The reversal of 66684023 is 32048666.

It is a cyclic number.

It is not a de Polignac number, because 66684023 - 2² = 66684019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66684029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51008 + ... + 52298.

It is an arithmetic number, because the mean of its divisors is an integer number (4899264).

Almost surely, 2^66684023 is an apocalyptic number.

66684023 is a deficient number, since it is larger than the sum of its proper divisors (11704201).

66684023 is a wasteful number, since it uses less digits than its factorization.

66684023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 66684023 is about 8166.0285941209. The cubic root of 66684023 is about 405.5153182267.

The spelling of 66684023 in words is "sixty-six million, six hundred eighty-four thousand, twenty-three".