66274623 has 12 divisors (see below), whose sum is σ = 96626088. Its totient is φ = 43769520.

The previous prime is 66274589. The next prime is 66274627. The reversal of 66274623 is 32647266.

It is a happy number.

66274623 is a `hidden beast` number, since 6 + 6 + 27 + 4 + 623 = 666.

It is not a de Polignac number, because 66274623 - 2²⁰ = 65226047 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66274627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33448 + ... + 35373.

It is an arithmetic number, because the mean of its divisors is an integer number (8052174).

Almost surely, 2^66274623 is an apocalyptic number.

66274623 is a deficient number, since it is larger than the sum of its proper divisors (30351465).

66274623 is a wasteful number, since it uses less digits than its factorization.

66274623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68934 (or 68931 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 66274623 is about 8140.9227363979. The cubic root of 66274623 is about 404.6837402979.

The spelling of 66274623 in words is "sixty-six million, two hundred seventy-four thousand, six hundred twenty-three".