40664361366 has 64 divisors (see below), whose sum is σ = 92757519360. Its totient is φ = 13198883040.

The previous prime is 40664361349. The next prime is 40664361371. The reversal of 40664361366 is 66316346604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459321 + ... + 540651.

It is an arithmetic number, because the mean of its divisors is an integer number (1449336240).

Almost surely, 2^40664361366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40664361366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46378759680).

40664361366 is an abundant number, since it is smaller than the sum of its proper divisors (52093157994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40664361366 is a wasteful number, since it uses less digits than its factorization.

40664361366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81586 (or 81580 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 45.

The spelling of 40664361366 in words is "forty billion, six hundred sixty-four million, three hundred sixty-one thousand, three hundred sixty-six".