66572770 has 64 divisors (see below), whose sum is σ = 140434560. Its totient is φ = 22464000.

The previous prime is 66572767. The next prime is 66572771. The reversal of 66572770 is 7727566.

It is not an unprimeable number, because it can be changed into a prime (66572771) 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 31 ways as a sum of consecutive naturals, for example, 110470 + ... + 111070.

It is an arithmetic number, because the mean of its divisors is an integer number (2194290).

Almost surely, 2^66572770 is an apocalyptic number.

66572770 is an abundant number, since it is smaller than the sum of its proper divisors (73861790).

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

66572770 is a wasteful number, since it uses less digits than its factorization.

66572770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691.

The product of its (nonzero) digits is 123480, while the sum is 40.

The square root of 66572770 is about 8159.2138101658. The cubic root of 66572770 is about 405.2896774300.

The spelling of 66572770 in words is "sixty-six million, five hundred seventy-two thousand, seven hundred seventy".