8415663740 has 72 divisors (see below), whose sum is σ = 19626388656. Its totient is φ = 3028608000.

The previous prime is 8415663689. The next prime is 8415663779. The reversal of 8415663740 is 473665148.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 8415663691 and 8415663700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216815 + ... + 252665.

Almost surely, 2^8415663740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8415663740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9813194328).

8415663740 is an abundant number, since it is smaller than the sum of its proper divisors (11210724916).

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

8415663740 is a wasteful number, since it uses less digits than its factorization.

8415663740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35979 (or 35966 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 8415663740 is about 91736.9268070388. The cubic root of 8415663740 is about 2034.0554662210.

The spelling of 8415663740 in words is "eight billion, four hundred fifteen million, six hundred sixty-three thousand, seven hundred forty".