66702216 has 32 divisors (see below), whose sum is σ = 190578240. Its totient is φ = 19057728.

The previous prime is 66702191. The next prime is 66702227. The reversal of 66702216 is 61220766.

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, 198351 + ... + 198686.

It is an arithmetic number, because the mean of its divisors is an integer number (5955570).

Almost surely, 2^66702216 is an apocalyptic number.

It is an amenable number.

66702216 is an abundant number, since it is smaller than the sum of its proper divisors (123876024).

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

66702216 is a wasteful number, since it uses less digits than its factorization.

66702216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397053 (or 397049 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 66702216 is about 8167.1424623304. The cubic root of 66702216 is about 405.5521929734.

The spelling of 66702216 in words is "sixty-six million, seven hundred two thousand, two hundred sixteen".