66774231 has 12 divisors (see below), whose sum is σ = 97407960. Its totient is φ = 44074800.

The previous prime is 66774203. The next prime is 66774241. The reversal of 66774231 is 13247766.

It is not a de Polignac number, because 66774231 - 2⁶ = 66774167 is a prime.

It is a super-2 number, since 2×66774231² = 8917595851282722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66774241) 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, 35821 + ... + 37638.

It is an arithmetic number, because the mean of its divisors is an integer number (8117330).

Almost surely, 2^66774231 is an apocalyptic number.

66774231 is a deficient number, since it is larger than the sum of its proper divisors (30633729).

66774231 is a wasteful number, since it uses less digits than its factorization.

66774231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73566 (or 73563 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 66774231 is about 8171.5500977477. The cubic root of 66774231 is about 405.6980918582.

The spelling of 66774231 in words is "sixty-six million, seven hundred seventy-four thousand, two hundred thirty-one".