66698338 has 16 divisors (see below), whose sum is σ = 114526080. Its totient is φ = 28538496.

The previous prime is 66698273. The next prime is 66698351. The reversal of 66698338 is 83389666.

It is a junction number, because it is equal to n+sod(n) for n = 66698291 and 66698300.

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, 5883 + ... + 12961.

It is an arithmetic number, because the mean of its divisors is an integer number (7157880).

Almost surely, 2^66698338 is an apocalyptic number.

66698338 is a deficient number, since it is larger than the sum of its proper divisors (47827742).

66698338 is a wasteful number, since it uses less digits than its factorization.

66698338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7761.

The product of its digits is 1119744, while the sum is 49.

The square root of 66698338 is about 8166.9050441400. The cubic root of 66698338 is about 405.5443333550.

The spelling of 66698338 in words is "sixty-six million, six hundred ninety-eight thousand, three hundred thirty-eight".