66672236 has 24 divisors (see below), whose sum is σ = 119123760. Its totient is φ = 32643072.

The previous prime is 66672223. The next prime is 66672241. The reversal of 66672236 is 63227666.

It is a self number, because there is not a number n which added to its sum of digits gives 66672236.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51080 + ... + 52368.

It is an arithmetic number, because the mean of its divisors is an integer number (4963490).

Almost surely, 2^66672236 is an apocalyptic number.

It is an amenable number.

66672236 is a deficient number, since it is larger than the sum of its proper divisors (52451524).

66672236 is a wasteful number, since it uses less digits than its factorization.

66672236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553 (or 1551 counting only the distinct ones).

The product of its digits is 108864, while the sum is 38.

The square root of 66672236 is about 8165.3068527766. The cubic root of 66672236 is about 405.4914239939.

The spelling of 66672236 in words is "sixty-six million, six hundred seventy-two thousand, two hundred thirty-six".