7716661560 has 128 divisors (see below), whose sum is σ = 25767720000. Its totient is φ = 2054135808.

The previous prime is 7716661523. The next prime is 7716661609. The reversal of 7716661560 is 651666177.

It is a super-3 number, since 3×7716661560³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 634416 + ... + 646464.

Almost surely, 2^7716661560 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 7716661560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12883860000).

7716661560 is an abundant number, since it is smaller than the sum of its proper divisors (18051058440).

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

7716661560 is a wasteful number, since it uses less digits than its factorization.

7716661560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12662 (or 12652 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 7716661560 is about 87844.5306208645. The cubic root of 7716661560 is about 1976.1040932286.

The spelling of 7716661560 in words is "seven billion, seven hundred sixteen million, six hundred sixty-one thousand, five hundred sixty".