66084724 has 12 divisors (see below), whose sum is σ = 115720164. Its totient is φ = 33021824.

The previous prime is 66084709. The next prime is 66084749. The reversal of 66084724 is 42748066.

It can be written as a sum of positive squares in 2 ways, for example, as 21622500 + 44462224 = 4650^2 + 6668^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3852 + ... + 12124.

It is an arithmetic number, because the mean of its divisors is an integer number (9643347).

Almost surely, 2^66084724 is an apocalyptic number.

It is an amenable number.

66084724 is a deficient number, since it is larger than the sum of its proper divisors (49635440).

66084724 is a wasteful number, since it uses less digits than its factorization.

66084724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10274 (or 10272 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 66084724 is about 8129.2511340221. The cubic root of 66084724 is about 404.2968523731.

The spelling of 66084724 in words is "sixty-six million, eighty-four thousand, seven hundred twenty-four".