66466388 has 6 divisors (see below), whose sum is σ = 116316186. Its totient is φ = 33233192.

The previous prime is 66466333. The next prime is 66466409. The reversal of 66466388 is 88366466.

It can be written as a sum of positive squares in only one way, i.e., 34904464 + 31561924 = 5908^2 + 5618^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8308295 + ... + 8308302.

It is an arithmetic number, because the mean of its divisors is an integer number (19386031).

Almost surely, 2^66466388 is an apocalyptic number.

It is an amenable number.

66466388 is a deficient number, since it is larger than the sum of its proper divisors (49849798).

66466388 is a wasteful number, since it uses less digits than its factorization.

66466388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16616601 (or 16616599 counting only the distinct ones).

The product of its digits is 995328, while the sum is 47.

The square root of 66466388 is about 8152.6920707212. The cubic root of 66466388 is about 405.0736806454.

The spelling of 66466388 in words is "sixty-six million, four hundred sixty-six thousand, three hundred eighty-eight".