40866157 has 4 divisors (see below), whose sum is σ = 41536156. Its totient is φ = 40196160.

The previous prime is 40866151. The next prime is 40866179. The reversal of 40866157 is 75166804.

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

It can be written as a sum of positive squares in 2 ways, for example, as 594441 + 40271716 = 771^2 + 6346^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40866157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40866151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334908 + ... + 335029.

It is an arithmetic number, because the mean of its divisors is an integer number (10384039).

Almost surely, 2^40866157 is an apocalyptic number.

It is an amenable number.

40866157 is a deficient number, since it is larger than the sum of its proper divisors (669999).

40866157 is an equidigital number, since it uses as much as digits as its factorization.

40866157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669998.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 40866157 is about 6392.6643115371. The cubic root of 40866157 is about 344.4460956987.

The spelling of 40866157 in words is "forty million, eight hundred sixty-six thousand, one hundred fifty-seven".