66742167 has 8 divisors (see below), whose sum is σ = 89146096. Its totient is φ = 44416512.

The previous prime is 66742141. The next prime is 66742199. The reversal of 66742167 is 76124766.

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

It is not a de Polignac number, because 66742167 - 2⁶ = 66742103 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 (66742267) 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, 17548 + ... + 21009.

It is an arithmetic number, because the mean of its divisors is an integer number (11143262).

Almost surely, 2^66742167 is an apocalyptic number.

66742167 is a deficient number, since it is larger than the sum of its proper divisors (22403929).

66742167 is a wasteful number, since it uses less digits than its factorization.

66742167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39137.

The product of its digits is 84672, while the sum is 39.

The square root of 66742167 is about 8169.5879333048. The cubic root of 66742167 is about 405.6331447166.

The spelling of 66742167 in words is "sixty-six million, seven hundred forty-two thousand, one hundred sixty-seven".