66742467 has 16 divisors (see below), whose sum is σ = 97597440. Its totient is φ = 40234400.

The previous prime is 66742457. The next prime is 66742471. The reversal of 66742467 is 76424766.

It is a cyclic number.

It is not a de Polignac number, because 66742467 - 2²⁰ = 65693891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66742457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1009 + ... + 11597.

It is an arithmetic number, because the mean of its divisors is an integer number (6099840).

Almost surely, 2^66742467 is an apocalyptic number.

66742467 is a deficient number, since it is larger than the sum of its proper divisors (30854973).

66742467 is a wasteful number, since it uses less digits than its factorization.

66742467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10794.

The product of its digits is 338688, while the sum is 42.

The square root of 66742467 is about 8169.6062940634. The cubic root of 66742467 is about 405.6337524771.

It can be divided in two parts, 667 and 42467, that added together give a palindrome (43134).

The spelling of 66742467 in words is "sixty-six million, seven hundred forty-two thousand, four hundred sixty-seven".