66765842 has 64 divisors (see below), whose sum is σ = 123742080. Its totient is φ = 26611200.

The previous prime is 66765793. The next prime is 66765863. The reversal of 66765842 is 24856766.

66765842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66765793 and 66765802.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 750134 + ... + 750222.

It is an arithmetic number, because the mean of its divisors is an integer number (1933470).

Almost surely, 2^66765842 is an apocalyptic number.

66765842 is a deficient number, since it is larger than the sum of its proper divisors (56976238).

66765842 is a wasteful number, since it uses less digits than its factorization.

66765842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219.

The product of its digits is 483840, while the sum is 44.

The square root of 66765842 is about 8171.0367763216. The cubic root of 66765842 is about 405.6811015523.

The spelling of 66765842 in words is "sixty-six million, seven hundred sixty-five thousand, eight hundred forty-two".