66406046 has 32 divisors (see below), whose sum is σ = 123809472. Its totient is φ = 26058240.

The previous prime is 66406033. The next prime is 66406049. The reversal of 66406046 is 64060466.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66406049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5036 + ... + 12576.

It is an arithmetic number, because the mean of its divisors is an integer number (3869046).

Almost surely, 2^66406046 is an apocalyptic number.

66406046 is a deficient number, since it is larger than the sum of its proper divisors (57403426).

66406046 is a wasteful number, since it uses less digits than its factorization.

66406046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7604.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 66406046 is about 8148.9904896251. The cubic root of 66406046 is about 404.9510604890.

The spelling of 66406046 in words is "sixty-six million, four hundred six thousand, forty-six".