66576256 has 32 divisors (see below), whose sum is σ = 133899480. Its totient is φ = 32970240.

The previous prime is 66576253. The next prime is 66576259. The reversal of 66576256 is 65267566.

66576256 = T₉₅ + T₉₆ + ... + T₇₃₆.

It is an interprime number because it is at equal distance from previous prime (66576253) and next prime (66576259).

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66576253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11266 + ... + 16126.

Almost surely, 2^66576256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66576256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66949740).

66576256 is an abundant number, since it is smaller than the sum of its proper divisors (67323224).

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

66576256 is a wasteful number, since it uses less digits than its factorization.

66576256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982 (or 4970 counting only the distinct ones).

The product of its digits is 453600, while the sum is 43.

The square root of 66576256 is about 8159.4274308924. The cubic root of 66576256 is about 405.2967514692.

The spelling of 66576256 in words is "sixty-six million, five hundred seventy-six thousand, two hundred fifty-six".