66672174 has 24 divisors (see below), whose sum is σ = 134847288. Its totient is φ = 21976320.

The previous prime is 66672173. The next prime is 66672217. The reversal of 66672174 is 47127666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66672173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55864 + ... + 57044.

It is an arithmetic number, because the mean of its divisors is an integer number (5618637).

Almost surely, 2^66672174 is an apocalyptic number.

66672174 is an abundant number, since it is smaller than the sum of its proper divisors (68175114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66672174 is a wasteful number, since it uses less digits than its factorization.

66672174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380 (or 1283 counting only the distinct ones).

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

The square root of 66672174 is about 8165.3030562252. The cubic root of 66672174 is about 405.4912983020.

The spelling of 66672174 in words is "sixty-six million, six hundred seventy-two thousand, one hundred seventy-four".