66872577 has 24 divisors (see below), whose sum is σ = 95577696. Its totient is φ = 41579008.

The previous prime is 66872573. The next prime is 66872581. The reversal of 66872577 is 77527866.

66872577 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 (66872573) and next prime (66872581).

It is not a de Polignac number, because 66872577 - 2² = 66872573 is a prime.

Its product of digits (987840) is a multiple of the sum of its prime divisors (720).

It is not an unprimeable number, because it can be changed into a prime (66872573) 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 in 23 ways as a sum of consecutive naturals, for example, 118498 + ... + 119060.

It is an arithmetic number, because the mean of its divisors is an integer number (3982404).

Almost surely, 2^66872577 is an apocalyptic number.

It is an amenable number.

66872577 is a deficient number, since it is larger than the sum of its proper divisors (28705119).

66872577 is a wasteful number, since it uses less digits than its factorization.

66872577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 720 counting only the distinct ones).

The product of its digits is 987840, while the sum is 48.

The square root of 66872577 is about 8177.5654690134. The cubic root of 66872577 is about 405.8971667215.

The spelling of 66872577 in words is "sixty-six million, eight hundred seventy-two thousand, five hundred seventy-seven".