66660467 has 4 divisors (see below), whose sum is σ = 67307760. Its totient is φ = 66013176.

The previous prime is 66660457. The next prime is 66660469. The reversal of 66660467 is 76406666.

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 66660467 - 2⁸ = 66660211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66660469) 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, 323492 + ... + 323697.

It is an arithmetic number, because the mean of its divisors is an integer number (16826940).

Almost surely, 2^66660467 is an apocalyptic number.

66660467 is a deficient number, since it is larger than the sum of its proper divisors (647293).

66660467 is a wasteful number, since it uses less digits than its factorization.

66660467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647292.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 66660467 is about 8164.5861499527. The cubic root of 66660467 is about 405.4675634403.

The spelling of 66660467 in words is "sixty-six million, six hundred sixty thousand, four hundred sixty-seven".