66948406 has 24 divisors (see below), whose sum is σ = 120591936. Its totient is φ = 27765360.

The previous prime is 66948403. The next prime is 66948473. The reversal of 66948406 is 60484966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66948403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7981 + ... + 14056.

It is an arithmetic number, because the mean of its divisors is an integer number (5024664).

Almost surely, 2^66948406 is an apocalyptic number.

66948406 is a deficient number, since it is larger than the sum of its proper divisors (53643530).

66948406 is a wasteful number, since it uses less digits than its factorization.

66948406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22084 (or 22077 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 66948406 is about 8182.2005597516. The cubic root of 66948406 is about 406.0505287885.

The spelling of 66948406 in words is "sixty-six million, nine hundred forty-eight thousand, four hundred six".