66121074 has 12 divisors (see below), whose sum is σ = 143262366. Its totient is φ = 22040352.

The previous prime is 66121063. The next prime is 66121103. The reversal of 66121074 is 47012166.

It can be written as a sum of positive squares in only one way, i.e., 40870449 + 25250625 = 6393^2 + 5025^2 .

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, 1836679 + ... + 1836714.

Almost surely, 2^66121074 is an apocalyptic number.

66121074 is an abundant number, since it is smaller than the sum of its proper divisors (77141292).

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

66121074 is a wasteful number, since it uses less digits than its factorization.

66121074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673401 (or 3673398 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 66121074 is about 8131.4865799557. The cubic root of 66121074 is about 404.3709668127.

The spelling of 66121074 in words is "sixty-six million, one hundred twenty-one thousand, seventy-four".