66942467 has 4 divisors (see below), whose sum is σ = 67789920. Its totient is φ = 66095016.

The previous prime is 66942461. The next prime is 66942479. The reversal of 66942467 is 76424966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76424966 = 2 ⋅38212483.

It is a cyclic number.

It is not a de Polignac number, because 66942467 - 2¹⁰ = 66941443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66942461) 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, 423608 + ... + 423765.

It is an arithmetic number, because the mean of its divisors is an integer number (16947480).

Almost surely, 2^66942467 is an apocalyptic number.

66942467 is a deficient number, since it is larger than the sum of its proper divisors (847453).

66942467 is an equidigital number, since it uses as much as digits as its factorization.

66942467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847452.

The product of its digits is 435456, while the sum is 44.

The square root of 66942467 is about 8181.8376297749. The cubic root of 66942467 is about 406.0385215053.

The spelling of 66942467 in words is "sixty-six million, nine hundred forty-two thousand, four hundred sixty-seven".