66674071 has 8 divisors (see below), whose sum is σ = 68072400. Its totient is φ = 65284800.

The previous prime is 66674011. The next prime is 66674107. The reversal of 66674071 is 17047666.

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

It is a cyclic number.

It is not a de Polignac number, because 66674071 - 2⁹ = 66673559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66674071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66674011) 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, 13771 + ... + 17971.

It is an arithmetic number, because the mean of its divisors is an integer number (8509050).

Almost surely, 2^66674071 is an apocalyptic number.

66674071 is a deficient number, since it is larger than the sum of its proper divisors (1398329).

66674071 is a wasteful number, since it uses less digits than its factorization.

66674071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4529.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 66674071 is about 8165.4192176520. The cubic root of 66674071 is about 405.4951440328.

The spelling of 66674071 in words is "sixty-six million, six hundred seventy-four thousand, seventy-one".