66814074 has 12 divisors (see below), whose sum is σ = 144763866. Its totient is φ = 22271352.

The previous prime is 66814067. The next prime is 66814109. The reversal of 66814074 is 47041866.

It can be written as a sum of positive squares in only one way, i.e., 59213025 + 7601049 = 7695^2 + 2757^2 .

It is a Curzon number.

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, 1855929 + ... + 1855964.

Almost surely, 2^66814074 is an apocalyptic number.

66814074 is an abundant number, since it is smaller than the sum of its proper divisors (77949792).

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

66814074 is a wasteful number, since it uses less digits than its factorization.

66814074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711901 (or 3711898 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 66814074 is about 8173.9876437391. The cubic root of 66814074 is about 405.7787667679.

The spelling of 66814074 in words is "sixty-six million, eight hundred fourteen thousand, seventy-four".