66674047 has 8 divisors (see below), whose sum is σ = 72796752. Its totient is φ = 60561600.

The previous prime is 66674011. The next prime is 66674107. The reversal of 66674047 is 74047666.

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

It is not a de Polignac number, because 66674047 - 2¹⁵ = 66641279 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 (66671047) 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, 18843 + ... + 22099.

It is an arithmetic number, because the mean of its divisors is an integer number (9099594).

Almost surely, 2^66674047 is an apocalyptic number.

66674047 is a deficient number, since it is larger than the sum of its proper divisors (6122705).

66674047 is a wasteful number, since it uses less digits than its factorization.

66674047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 66674047 is about 8165.4177480396. The cubic root of 66674047 is about 405.4950953788.

The spelling of 66674047 in words is "sixty-six million, six hundred seventy-four thousand, forty-seven".