66308406 has 32 divisors (see below), whose sum is σ = 136429920. Its totient is φ = 21475584.

The previous prime is 66308387. The next prime is 66308443. The reversal of 66308406 is 60480366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33706 + ... + 35618.

It is an arithmetic number, because the mean of its divisors is an integer number (4263435).

Almost surely, 2^66308406 is an apocalyptic number.

66308406 is an abundant number, since it is smaller than the sum of its proper divisors (70121514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66308406 is a wasteful number, since it uses less digits than its factorization.

66308406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 66308406 is about 8142.9973596950. The cubic root of 66308406 is about 404.7524901344.

The spelling of 66308406 in words is "sixty-six million, three hundred eight thousand, four hundred six".