40346066640 has 160 divisors (see below), whose sum is σ = 136858240512. Its totient is φ = 9751104000.

The previous prime is 40346066611. The next prime is 40346066647. The reversal of 40346066640 is 4666064304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40346066647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 850755 + ... + 896925.

Almost surely, 2^40346066640 is an apocalyptic number.

40346066640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40346066640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68429120256).

40346066640 is an abundant number, since it is smaller than the sum of its proper divisors (96512173872).

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

40346066640 is a wasteful number, since it uses less digits than its factorization.

40346066640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46529 (or 46523 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 39.

The spelling of 40346066640 in words is "forty billion, three hundred forty-six million, sixty-six thousand, six hundred forty".