86777661 has 4 divisors (see below), whose sum is σ = 115703552. Its totient is φ = 57851772.

The previous prime is 86777611. The next prime is 86777681. The reversal of 86777661 is 16677768.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 86777661 - 2⁷ = 86777533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86777661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86777611) 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, 14462941 + ... + 14462946.

It is an arithmetic number, because the mean of its divisors is an integer number (28925888).

Almost surely, 2^86777661 is an apocalyptic number.

It is an amenable number.

86777661 is a deficient number, since it is larger than the sum of its proper divisors (28925891).

86777661 is a wasteful number, since it uses less digits than its factorization.

86777661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28925890.

The product of its digits is 592704, while the sum is 48.

The square root of 86777661 is about 9315.4528070298. The cubic root of 86777661 is about 442.7269709234.

The spelling of 86777661 in words is "eighty-six million, seven hundred seventy-seven thousand, six hundred sixty-one".