40781066 has 8 divisors (see below), whose sum is σ = 61538400. Its totient is φ = 20268268.

The previous prime is 40781053. The next prime is 40781107. The reversal of 40781066 is 66018704.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60716 + ... + 61383.

It is an arithmetic number, because the mean of its divisors is an integer number (7692300).

Almost surely, 2^40781066 is an apocalyptic number.

40781066 is a deficient number, since it is larger than the sum of its proper divisors (20757334).

40781066 is a wasteful number, since it uses less digits than its factorization.

40781066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122268.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 40781066 is about 6386.0054807368. The cubic root of 40781066 is about 344.2068624643.

The spelling of 40781066 in words is "forty million, seven hundred eighty-one thousand, sixty-six".