66484408 has 8 divisors (see below), whose sum is σ = 124658280. Its totient is φ = 33242200.

The previous prime is 66484403. The next prime is 66484427. The reversal of 66484408 is 80448466.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×66484408² = 8840353014220928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66484403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4155268 + ... + 4155283.

It is an arithmetic number, because the mean of its divisors is an integer number (15582285).

Almost surely, 2^66484408 is an apocalyptic number.

It is an amenable number.

66484408 is a deficient number, since it is larger than the sum of its proper divisors (58173872).

66484408 is a wasteful number, since it uses less digits than its factorization.

66484408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8310557 (or 8310553 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 66484408 is about 8153.7971522475. The cubic root of 66484408 is about 405.1102844506.

The spelling of 66484408 in words is "sixty-six million, four hundred eighty-four thousand, four hundred eight".