86669218 has 4 divisors (see below), whose sum is σ = 130003830. Its totient is φ = 43334608.

The previous prime is 86669201. The next prime is 86669237. The reversal of 86669218 is 81296668.

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

It can be written as a sum of positive squares in only one way, i.e., 57108249 + 29560969 = 7557^2 + 5437^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21667303 + ... + 21667306.

Almost surely, 2^86669218 is an apocalyptic number.

86669218 is a deficient number, since it is larger than the sum of its proper divisors (43334612).

86669218 is a wasteful number, since it uses less digits than its factorization.

86669218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43334611.

The product of its digits is 248832, while the sum is 46.

The square root of 86669218 is about 9309.6303900853. The cubic root of 86669218 is about 442.5424739252.

The spelling of 86669218 in words is "eighty-six million, six hundred sixty-nine thousand, two hundred eighteen".