7661020744 has 64 divisors (see below), whose sum is σ = 15806957040. Its totient is φ = 3459317760.

The previous prime is 7661020729. The next prime is 7661020747. The reversal of 7661020744 is 4470201667.

It can be written as a sum of positive squares in 8 ways, for example, as 1727399844 + 5933620900 = 41562^2 + 77030^2 .

It is not an unprimeable number, because it can be changed into a prime (7661020747) 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, 1221264 + ... + 1227520.

Almost surely, 2^7661020744 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 7661020744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7903478520).

7661020744 is an abundant number, since it is smaller than the sum of its proper divisors (8145936296).

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

7661020744 is a wasteful number, since it uses less digits than its factorization.

7661020744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530 (or 6526 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 7661020744 is about 87527.2571488448. The cubic root of 7661020744 is about 1971.3430802767.

The spelling of 7661020744 in words is "seven billion, six hundred sixty-one million, twenty thousand, seven hundred forty-four".