87766533 has 12 divisors (see below), whose sum is σ = 127508940. Its totient is φ = 58171776.

The previous prime is 87766517. The next prime is 87766537. The reversal of 87766533 is 33566778.

It can be written as a sum of positive squares in 2 ways, for example, as 41757444 + 46009089 = 6462^2 + 6783^2 .

It is not a de Polignac number, because 87766533 - 2⁴ = 87766517 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87766537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26628 + ... + 29741.

It is an arithmetic number, because the mean of its divisors is an integer number (10625745).

Almost surely, 2^87766533 is an apocalyptic number.

It is an amenable number.

87766533 is a deficient number, since it is larger than the sum of its proper divisors (39742407).

87766533 is a wasteful number, since it uses less digits than its factorization.

87766533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56548 (or 56545 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 87766533 is about 9368.3794222907. The cubic root of 87766533 is about 444.4023167407.

The spelling of 87766533 in words is "eighty-seven million, seven hundred sixty-six thousand, five hundred thirty-three".