66406006 has 8 divisors (see below), whose sum is σ = 100636200. Its totient is φ = 32860608.

The previous prime is 66405949. The next prime is 66406013. The reversal of 66406006 is 60060466.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 170956 + ... + 171343.

It is an arithmetic number, because the mean of its divisors is an integer number (12579525).

Almost surely, 2^66406006 is an apocalyptic number.

66406006 is a deficient number, since it is larger than the sum of its proper divisors (34230194).

66406006 is a wasteful number, since it uses less digits than its factorization.

66406006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342398.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 66406006 is about 8148.9880353330. The cubic root of 66406006 is about 404.9509791809.

The spelling of 66406006 in words is "sixty-six million, four hundred six thousand, six".