66195042 has 16 divisors (see below), whose sum is σ = 140177952. Its totient is φ = 20767040.

The previous prime is 66195037. The next prime is 66195049. The reversal of 66195042 is 24059166.

66195042 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 = 66194994 and 66195012.

It is not an unprimeable number, because it can be changed into a prime (66195049) 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 7 ways as a sum of consecutive naturals, for example, 324384 + ... + 324587.

It is an arithmetic number, because the mean of its divisors is an integer number (8761122).

Almost surely, 2^66195042 is an apocalyptic number.

66195042 is an abundant number, since it is smaller than the sum of its proper divisors (73982910).

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

66195042 is a wasteful number, since it uses less digits than its factorization.

66195042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648993.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 66195042 is about 8136.0335545031. The cubic root of 66195042 is about 404.5216971997.

It can be divided in two parts, 661 and 95042, that added together give a triangular number (95703 = T₄₃₇).

The spelling of 66195042 in words is "sixty-six million, one hundred ninety-five thousand, forty-two".