42166772 has 6 divisors (see below), whose sum is σ = 73791858. Its totient is φ = 21083384.

The previous prime is 42166763. The next prime is 42166777. The reversal of 42166772 is 27766124.

42166772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 41654116 + 512656 = 6454^2 + 716^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42166777) 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 as a sum of consecutive naturals, namely, 5270843 + ... + 5270850.

It is an arithmetic number, because the mean of its divisors is an integer number (12298643).

Almost surely, 2^42166772 is an apocalyptic number.

It is an amenable number.

42166772 is a deficient number, since it is larger than the sum of its proper divisors (31625086).

42166772 is a wasteful number, since it uses less digits than its factorization.

42166772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10541697 (or 10541695 counting only the distinct ones).

The product of its digits is 28224, while the sum is 35.

The square root of 42166772 is about 6493.5946901543. The cubic root of 42166772 is about 348.0621393418.

The spelling of 42166772 in words is "forty-two million, one hundred sixty-six thousand, seven hundred seventy-two".