40661263 has 8 divisors (see below), whose sum is σ = 44925408. Its totient is φ = 36605184.

The previous prime is 40661227. The next prime is 40661281. The reversal of 40661263 is 36216604.

40661263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40661263 - 2²⁵ = 7106831 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 (40661213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51606 + ... + 52387.

It is an arithmetic number, because the mean of its divisors is an integer number (5615676).

Almost surely, 2^40661263 is an apocalyptic number.

40661263 is a deficient number, since it is larger than the sum of its proper divisors (4264145).

40661263 is a wasteful number, since it uses less digits than its factorization.

40661263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104033.

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

The square root of 40661263 is about 6376.6184612222. The cubic root of 40661263 is about 343.8694717285.

Adding to 40661263 its reverse (36216604), we get a palindrome (76877867).

It can be divided in two parts, 4066 and 1263, that added together give a square (5329 = 73²).

The spelling of 40661263 in words is "forty million, six hundred sixty-one thousand, two hundred sixty-three".