66551367 has 16 divisors (see below), whose sum is σ = 89999360. Its totient is φ = 43740000.

The previous prime is 66551363. The next prime is 66551377. The reversal of 66551367 is 76315566.

It is not a de Polignac number, because 66551367 - 2² = 66551363 is a prime.

It is a Duffinian number.

Its product of digits (113400) is a multiple of the sum of its prime divisors (1134).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66551363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88242 + ... + 88992.

It is an arithmetic number, because the mean of its divisors is an integer number (5624960).

Almost surely, 2^66551367 is an apocalyptic number.

66551367 is a deficient number, since it is larger than the sum of its proper divisors (23447993).

66551367 is a wasteful number, since it uses less digits than its factorization.

66551367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134.

The product of its digits is 113400, while the sum is 39.

The square root of 66551367 is about 8157.9021200306. The cubic root of 66551367 is about 405.2462395262.

The spelling of 66551367 in words is "sixty-six million, five hundred fifty-one thousand, three hundred sixty-seven".