86677681 has 4 divisors (see below), whose sum is σ = 86866164. Its totient is φ = 86489200.

The previous prime is 86677663. The next prime is 86677687. The reversal of 86677681 is 18677668.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52056225 + 34621456 = 7215^2 + 5884^2 .

It is a cyclic number.

It is not a de Polignac number, because 86677681 - 2⁷ = 86677553 is a prime.

It is a super-2 number, since 2×86677681² = 15026040767075522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86677687) 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, 93550 + ... + 94471.

It is an arithmetic number, because the mean of its divisors is an integer number (21716541).

Almost surely, 2^86677681 is an apocalyptic number.

It is an amenable number.

86677681 is a deficient number, since it is larger than the sum of its proper divisors (188483).

86677681 is a wasteful number, since it uses less digits than its factorization.

86677681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188482.

The product of its digits is 677376, while the sum is 49.

The square root of 86677681 is about 9310.0849083131. The cubic root of 86677681 is about 442.5568777899.

The spelling of 86677681 in words is "eighty-six million, six hundred seventy-seven thousand, six hundred eighty-one".