66714642 has 12 divisors (see below), whose sum is σ = 144548430. Its totient is φ = 22238208.

The previous prime is 66714623. The next prime is 66714671. The reversal of 66714642 is 24641766.

66714642 is a `hidden beast` number, since 6 + 6 + 7 + 1 + 4 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 41100921 + 25613721 = 6411^2 + 5061^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66714597 and 66714606.

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, 1853167 + ... + 1853202.

Almost surely, 2^66714642 is an apocalyptic number.

66714642 is an abundant number, since it is smaller than the sum of its proper divisors (77833788).

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

66714642 is a wasteful number, since it uses less digits than its factorization.

66714642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3706377 (or 3706374 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 66714642 is about 8167.9031580939. The cubic root of 66714642 is about 405.5773749386.

The spelling of 66714642 in words is "sixty-six million, seven hundred fourteen thousand, six hundred forty-two".