66407446 has 12 divisors (see below), whose sum is σ = 115874388. Its totient is φ = 28460292.

The previous prime is 66407431. The next prime is 66407447. The reversal of 66407446 is 64470466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66407447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 338716 + ... + 338911.

It is an arithmetic number, because the mean of its divisors is an integer number (9656199).

Almost surely, 2^66407446 is an apocalyptic number.

66407446 is a deficient number, since it is larger than the sum of its proper divisors (49466942).

66407446 is a wasteful number, since it uses less digits than its factorization.

66407446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677643 (or 677636 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 66407446 is about 8149.0763893830. The cubic root of 66407446 is about 404.9539062514.

The spelling of 66407446 in words is "sixty-six million, four hundred seven thousand, four hundred forty-six".