66117474 has 12 divisors (see below), whose sum is σ = 143254566. Its totient is φ = 22039152.

The previous prime is 66117463. The next prime is 66117481. The reversal of 66117474 is 47471166.

It can be written as a sum of positive squares in only one way, i.e., 51624225 + 14493249 = 7185^2 + 3807^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1836579 + ... + 1836614.

Almost surely, 2^66117474 is an apocalyptic number.

66117474 is an abundant number, since it is smaller than the sum of its proper divisors (77137092).

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

66117474 is a wasteful number, since it uses less digits than its factorization.

66117474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673201 (or 3673198 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 66117474 is about 8131.2652152048. The cubic root of 66117474 is about 404.3636279427.

The spelling of 66117474 in words is "sixty-six million, one hundred seventeen thousand, four hundred seventy-four".