66667349 has 8 divisors (see below), whose sum is σ = 76554048. Its totient is φ = 56871360.

The previous prime is 66667339. The next prime is 66667397. The reversal of 66667349 is 94376666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66667349 - 2⁸ = 66667093 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 (66667309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21092 + ... + 24045.

It is an arithmetic number, because the mean of its divisors is an integer number (9569256).

Almost surely, 2^66667349 is an apocalyptic number.

It is an amenable number.

66667349 is a deficient number, since it is larger than the sum of its proper divisors (9886699).

66667349 is a wasteful number, since it uses less digits than its factorization.

66667349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45355.

The product of its digits is 979776, while the sum is 47.

The square root of 66667349 is about 8165.0075933829. The cubic root of 66667349 is about 405.4815163966.

The spelling of 66667349 in words is "sixty-six million, six hundred sixty-seven thousand, three hundred forty-nine".