7663297640 has 64 divisors (see below), whose sum is σ = 17528693760. Its totient is φ = 3014668800.

The previous prime is 7663297639. The next prime is 7663297643. The reversal of 7663297640 is 467923667.

It is a super-2 number, since 2×7663297640² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7663297643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1068065 + ... + 1075215.

It is an arithmetic number, because the mean of its divisors is an integer number (273885840).

Almost surely, 2^7663297640 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 7663297640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8764346880).

7663297640 is an abundant number, since it is smaller than the sum of its proper divisors (9865396120).

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

7663297640 is a wasteful number, since it uses less digits than its factorization.

7663297640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7602 (or 7598 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 50.

The square root of 7663297640 is about 87540.2629651065. The cubic root of 7663297640 is about 1971.5383588052.

The spelling of 7663297640 in words is "seven billion, six hundred sixty-three million, two hundred ninety-seven thousand, six hundred forty".