66480870 has 32 divisors (see below), whose sum is σ = 161579520. Its totient is φ = 17503200.

The previous prime is 66480859. The next prime is 66480893. The reversal of 66480870 is 7808466.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11656 + ... + 16395.

It is an arithmetic number, because the mean of its divisors is an integer number (5049360).

Almost surely, 2^66480870 is an apocalyptic number.

66480870 is an abundant number, since it is smaller than the sum of its proper divisors (95098650).

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

66480870 is a wasteful number, since it uses less digits than its factorization.

66480870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28140.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 66480870 is about 8153.5801952271. The cubic root of 66480870 is about 405.1030982764.

The spelling of 66480870 in words is "sixty-six million, four hundred eighty thousand, eight hundred seventy".