87766471 has 4 divisors (see below), whose sum is σ = 94517752. Its totient is φ = 81015192.

The previous prime is 87766457. The next prime is 87766477. The reversal of 87766471 is 17466778.

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

It is a cyclic number.

It is not a de Polignac number, because 87766471 - 2⁵ = 87766439 is a prime.

It is a super-3 number, since 3×87766471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87766477) 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, 3375621 + ... + 3375646.

It is an arithmetic number, because the mean of its divisors is an integer number (23629438).

Almost surely, 2^87766471 is an apocalyptic number.

87766471 is a deficient number, since it is larger than the sum of its proper divisors (6751281).

87766471 is a wasteful number, since it uses less digits than its factorization.

87766471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6751280.

The product of its digits is 395136, while the sum is 46.

The square root of 87766471 is about 9368.3761132867. The cubic root of 87766471 is about 444.4022120959.

The spelling of 87766471 in words is "eighty-seven million, seven hundred sixty-six thousand, four hundred seventy-one".