66574674 has 24 divisors (see below), whose sum is σ = 144433692. Its totient is φ = 22162560.

The previous prime is 66574667. The next prime is 66574681. The reversal of 66574674 is 47647566.

It is a happy number.

66574674 is a `hidden beast` number, since 6 + 6 + 574 + 6 + 74 = 666.

It is an interprime number because it is at equal distance from previous prime (66574667) and next prime (66574681).

It can be written as a sum of positive squares in 2 ways, for example, as 66536649 + 38025 = 8157^2 + 195^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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, 15214 + ... + 19094.

Almost surely, 2^66574674 is an apocalyptic number.

66574674 is an abundant number, since it is smaller than the sum of its proper divisors (77859018).

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

66574674 is a wasteful number, since it uses less digits than its factorization.

66574674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4842 (or 4839 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 66574674 is about 8159.3304872397. The cubic root of 66574674 is about 405.2935411929.

The spelling of 66574674 in words is "sixty-six million, five hundred seventy-four thousand, six hundred seventy-four".