40066868 has 6 divisors (see below), whose sum is σ = 70117026. Its totient is φ = 20033432.

The previous prime is 40066861. The next prime is 40066903. The reversal of 40066868 is 86866004.

It can be written as a sum of positive squares in only one way, i.e., 27478564 + 12588304 = 5242^2 + 3548^2 .

It is a super-2 number, since 2×40066868² = 3210707822658848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40066861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5008355 + ... + 5008362.

It is an arithmetic number, because the mean of its divisors is an integer number (11686171).

Almost surely, 2^40066868 is an apocalyptic number.

It is an amenable number.

40066868 is a deficient number, since it is larger than the sum of its proper divisors (30050158).

40066868 is a wasteful number, since it uses less digits than its factorization.

40066868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10016721 (or 10016719 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 40066868 is about 6329.8394924358. The cubic root of 40066868 is about 342.1856543606.

The spelling of 40066868 in words is "forty million, sixty-six thousand, eight hundred sixty-eight".