7661488387 has 16 divisors (see below), whose sum is σ = 8866593792. Its totient is φ = 6484127040.

The previous prime is 7661488381. The next prime is 7661488399. The reversal of 7661488387 is 7838841667.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7661488387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7661488381) 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, 1549383 + ... + 1554319.

It is an arithmetic number, because the mean of its divisors is an integer number (554162112).

Almost surely, 2^7661488387 is an apocalyptic number.

7661488387 is a deficient number, since it is larger than the sum of its proper divisors (1205105405).

7661488387 is a wasteful number, since it uses less digits than its factorization.

7661488387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7698.

The product of its digits is 10838016, while the sum is 58.

The square root of 7661488387 is about 87529.9285216205. The cubic root of 7661488387 is about 1971.3831909471.

The spelling of 7661488387 in words is "seven billion, six hundred sixty-one million, four hundred eighty-eight thousand, three hundred eighty-seven".