616665995040 has 96 divisors (see below), whose sum is σ = 1943906561856. Its totient is φ = 164325012480.

The previous prime is 616665995017. The next prime is 616665995041. The reversal of 616665995040 is 40599566616.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (616665995041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197739 + ... + 1128021.

It is an arithmetic number, because the mean of its divisors is an integer number (20249026686).

Almost surely, 2^616665995040 is an apocalyptic number.

616665995040 is a gapful number since it is divisible by the number (60) 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 616665995040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (971953280928).

616665995040 is an abundant number, since it is smaller than the sum of its proper divisors (1327240566816).

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

616665995040 is a wasteful number, since it uses less digits than its factorization.

616665995040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931682 (or 931674 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 57.

The spelling of 616665995040 in words is "six hundred sixteen billion, six hundred sixty-five million, nine hundred ninety-five thousand, forty".