40786666 has 4 divisors (see below), whose sum is σ = 61180002. Its totient is φ = 20393332.

The previous prime is 40786651. The next prime is 40786667. The reversal of 40786666 is 66668704.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 37564641 + 3222025 = 6129^2 + 1795^2 .

40786666 is a modest number, since divided by 6666 gives 4078 as remainder.

It is not an unprimeable number, because it can be changed into a prime (40786667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10196665 + ... + 10196668.

Almost surely, 2^40786666 is an apocalyptic number.

40786666 is a deficient number, since it is larger than the sum of its proper divisors (20393336).

40786666 is a wasteful number, since it uses less digits than its factorization.

40786666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20393335.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 40786666 is about 6386.4439244387. The cubic root of 40786666 is about 344.2226170811. Note that the first 3 decimals are identical.

The spelling of 40786666 in words is "forty million, seven hundred eighty-six thousand, six hundred sixty-six".