87664477 has 8 divisors (see below), whose sum is σ = 94631040. Its totient is φ = 80960880.

The previous prime is 87664471. The next prime is 87664531. The reversal of 87664477 is 77446678.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87664477 - 2³ = 87664469 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 87664477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87664471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65049 + ... + 66382.

It is an arithmetic number, because the mean of its divisors is an integer number (11828880).

Almost surely, 2^87664477 is an apocalyptic number.

It is an amenable number.

87664477 is a deficient number, since it is larger than the sum of its proper divisors (6966563).

87664477 is a wasteful number, since it uses less digits than its factorization.

87664477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131483.

The product of its digits is 1580544, while the sum is 49.

The square root of 87664477 is about 9362.9310047655. The cubic root of 87664477 is about 444.2299977789.

The spelling of 87664477 in words is "eighty-seven million, six hundred sixty-four thousand, four hundred seventy-seven".