40661426 has 8 divisors (see below), whose sum is σ = 65683884. Its totient is φ = 18766800.

The previous prime is 40661407. The next prime is 40661449. The reversal of 40661426 is 62416604.

40661426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 34164025 + 6497401 = 5845^2 + 2549^2 .

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

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 781925 + ... + 781976.

Almost surely, 2^40661426 is an apocalyptic number.

40661426 is a deficient number, since it is larger than the sum of its proper divisors (25022458).

40661426 is a wasteful number, since it uses less digits than its factorization.

40661426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563916.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 40661426 is about 6376.6312422783. The cubic root of 40661426 is about 343.8699312211.

The spelling of 40661426 in words is "forty million, six hundred sixty-one thousand, four hundred twenty-six".