66388346 has 16 divisors (see below), whose sum is σ = 102453120. Its totient is φ = 32247840.

The previous prime is 66388243. The next prime is 66388351. The reversal of 66388346 is 64388366.

It is a junction number, because it is equal to n+sod(n) for n = 66388297 and 66388306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10526 + ... + 15606.

It is an arithmetic number, because the mean of its divisors is an integer number (6403320).

Almost surely, 2^66388346 is an apocalyptic number.

66388346 is a deficient number, since it is larger than the sum of its proper divisors (36064774).

66388346 is a wasteful number, since it uses less digits than its factorization.

66388346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5269.

The product of its digits is 497664, while the sum is 44.

The square root of 66388346 is about 8147.9043931553. The cubic root of 66388346 is about 404.9150784706.

The spelling of 66388346 in words is "sixty-six million, three hundred eighty-eight thousand, three hundred forty-six".