66872896 has 14 divisors (see below), whose sum is σ = 132701030. Its totient is φ = 33436416.

The previous prime is 66872893. The next prime is 66872899. The reversal of 66872896 is 69827866.

66872896 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66872893) and next prime (66872899).

It can be written as a sum of positive squares in only one way, i.e., 66585600 + 287296 = 8160^2 + 536^2 .

It is not an unprimeable number, because it can be changed into a prime (66872893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522381 + ... + 522508.

It is an arithmetic number, because the mean of its divisors is an integer number (9478645).

Almost surely, 2^66872896 is an apocalyptic number.

It is an amenable number.

66872896 is a deficient number, since it is larger than the sum of its proper divisors (65828134).

66872896 is a wasteful number, since it uses less digits than its factorization.

66872896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044901 (or 1044891 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 52.

The square root of 66872896 is about 8177.5849735726. The cubic root of 66872896 is about 405.8978121330.

The spelling of 66872896 in words is "sixty-six million, eight hundred seventy-two thousand, eight hundred ninety-six".