7661521763 has 24 divisors (see below), whose sum is σ = 8994271680. Its totient is φ = 6506937360.

The previous prime is 7661521739. The next prime is 7661521771. The reversal of 7661521763 is 3671251667.

It is not a de Polignac number, because 7661521763 - 2¹⁰ = 7661520739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7661521793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3025808 + ... + 3028338.

It is an arithmetic number, because the mean of its divisors is an integer number (374761320).

Almost surely, 2^7661521763 is an apocalyptic number.

7661521763 is a deficient number, since it is larger than the sum of its proper divisors (1332749917).

7661521763 is a wasteful number, since it uses less digits than its factorization.

7661521763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3087 (or 3080 counting only the distinct ones).

The product of its digits is 317520, while the sum is 44.

The square root of 7661521763 is about 87530.1191762013. The cubic root of 7661521763 is about 1971.3860536106.

The spelling of 7661521763 in words is "seven billion, six hundred sixty-one million, five hundred twenty-one thousand, seven hundred sixty-three".