87766477 has 2 divisors, whose sum is σ = 87766478. Its totient is φ = 87766476.

The previous prime is 87766457. The next prime is 87766489. The reversal of 87766477 is 77466778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87721956 + 44521 = 9366^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 87766477 - 2¹¹ = 87764429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87766457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43883238 + 43883239.

It is an arithmetic number, because the mean of its divisors is an integer number (43883239).

Almost surely, 2^87766477 is an apocalyptic number.

It is an amenable number.

87766477 is a deficient number, since it is larger than the sum of its proper divisors (1).

87766477 is an equidigital number, since it uses as much as digits as its factorization.

87766477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2765952, while the sum is 52.

The square root of 87766477 is about 9368.3764335129. The cubic root of 87766477 is about 444.4022222228.

The spelling of 87766477 in words is "eighty-seven million, seven hundred sixty-six thousand, four hundred seventy-seven".