42066536 has 8 divisors (see below), whose sum is σ = 78874770. Its totient is φ = 21033264.

The previous prime is 42066527. The next prime is 42066569. The reversal of 42066536 is 63566024.

It can be written as a sum of positive squares in only one way, i.e., 28153636 + 13912900 = 5306^2 + 3730^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2629151 + ... + 2629166.

Almost surely, 2^42066536 is an apocalyptic number.

It is an amenable number.

42066536 is a deficient number, since it is larger than the sum of its proper divisors (36808234).

42066536 is a wasteful number, since it uses less digits than its factorization.

42066536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5258323 (or 5258319 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 42066536 is about 6485.8720308067. The cubic root of 42066536 is about 347.7861239214.

The spelling of 42066536 in words is "forty-two million, sixty-six thousand, five hundred thirty-six".