7666866087 has 4 divisors (see below), whose sum is σ = 10222488120. Its totient is φ = 5111244056.

The previous prime is 7666866071. The next prime is 7666866113. The reversal of 7666866087 is 7806686667.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7666866087 - 2⁴ = 7666866071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7666866087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666862087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277811012 + ... + 1277811017.

It is an arithmetic number, because the mean of its divisors is an integer number (2555622030).

Almost surely, 2^7666866087 is an apocalyptic number.

7666866087 is a deficient number, since it is larger than the sum of its proper divisors (2555622033).

7666866087 is a wasteful number, since it uses less digits than its factorization.

7666866087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555622032.

The product of its (nonzero) digits is 24385536, while the sum is 60.

The square root of 7666866087 is about 87560.6423400377. The cubic root of 7666866087 is about 1971.8443297133.

The spelling of 7666866087 in words is "seven billion, six hundred sixty-six million, eight hundred sixty-six thousand, eighty-seven".