87766257 has 16 divisors (see below), whose sum is σ = 127256832. Its totient is φ = 53579520.

The previous prime is 87766243. The next prime is 87766303. The reversal of 87766257 is 75266778.

It is not a de Polignac number, because 87766257 - 2⁴ = 87766241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87766057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21369 + ... + 25142.

It is an arithmetic number, because the mean of its divisors is an integer number (7953552).

Almost surely, 2^87766257 is an apocalyptic number.

It is an amenable number.

87766257 is a deficient number, since it is larger than the sum of its proper divisors (39490575).

87766257 is a wasteful number, since it uses less digits than its factorization.

87766257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46568.

The product of its digits is 987840, while the sum is 48.

The square root of 87766257 is about 9368.3646918766. The cubic root of 87766257 is about 444.4018509020.

The spelling of 87766257 in words is "eighty-seven million, seven hundred sixty-six thousand, two hundred fifty-seven".