87776671 has 4 divisors (see below), whose sum is σ = 91593072. Its totient is φ = 83960272.

The previous prime is 87776669. The next prime is 87776677. The reversal of 87776671 is 17667778.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17667778 = 2 ⋅8833889.

It is a cyclic number.

It is not a de Polignac number, because 87776671 - 2¹ = 87776669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87776677) 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, 1908166 + ... + 1908211.

It is an arithmetic number, because the mean of its divisors is an integer number (22898268).

Almost surely, 2^87776671 is an apocalyptic number.

87776671 is a deficient number, since it is larger than the sum of its proper divisors (3816401).

87776671 is a wasteful number, since it uses less digits than its factorization.

87776671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3816400.

The product of its digits is 691488, while the sum is 49.

The square root of 87776671 is about 9368.9204821046. The cubic root of 87776671 is about 444.4194272006.

The spelling of 87776671 in words is "eighty-seven million, seven hundred seventy-six thousand, six hundred seventy-one".