66344867 has 4 divisors (see below), whose sum is σ = 68485056. Its totient is φ = 64204680.

The previous prime is 66344833. The next prime is 66344891. The reversal of 66344867 is 76844366.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66344867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66344567) 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, 1070048 + ... + 1070109.

It is an arithmetic number, because the mean of its divisors is an integer number (17121264).

Almost surely, 2^66344867 is an apocalyptic number.

66344867 is a deficient number, since it is larger than the sum of its proper divisors (2140189).

66344867 is a wasteful number, since it uses less digits than its factorization.

66344867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140188.

The product of its digits is 580608, while the sum is 44.

The square root of 66344867 is about 8145.2358468003. The cubic root of 66344867 is about 404.8266636182.

The spelling of 66344867 in words is "sixty-six million, three hundred forty-four thousand, eight hundred sixty-seven".