40231666 has 4 divisors (see below), whose sum is σ = 60347502. Its totient is φ = 20115832.

The previous prime is 40231657. The next prime is 40231693. The reversal of 40231666 is 66613204.

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., 32251041 + 7980625 = 5679^2 + 2825^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10057915 + ... + 10057918.

Almost surely, 2^40231666 is an apocalyptic number.

40231666 is a deficient number, since it is larger than the sum of its proper divisors (20115836).

40231666 is a wasteful number, since it uses less digits than its factorization.

40231666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20115835.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 40231666 is about 6342.8436840269. The cubic root of 40231666 is about 342.6541576095.

The spelling of 40231666 in words is "forty million, two hundred thirty-one thousand, six hundred sixty-six".