66706804 has 6 divisors (see below), whose sum is σ = 116736914. Its totient is φ = 33353400.

The previous prime is 66706799. The next prime is 66706811. The reversal of 66706804 is 40860766.

It can be written as a sum of positive squares in only one way, i.e., 43164900 + 23541904 = 6570^2 + 4852^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8338347 + ... + 8338354.

Almost surely, 2^66706804 is an apocalyptic number.

It is an amenable number.

66706804 is a deficient number, since it is larger than the sum of its proper divisors (50030110).

66706804 is a wasteful number, since it uses less digits than its factorization.

66706804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16676705 (or 16676703 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 66706804 is about 8167.4233390954. The cubic root of 66706804 is about 405.5614911692.

The spelling of 66706804 in words is "sixty-six million, seven hundred six thousand, eight hundred four".