86666066 has 4 divisors (see below), whose sum is σ = 129999102. Its totient is φ = 43333032.

The previous prime is 86666057. The next prime is 86666101. The reversal of 86666066 is 66066668.

It is a happy number.

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., 78943225 + 7722841 = 8885^2 + 2779^2 .

It is a super-2 number, since 2×86666066² = 15022013991832712, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 21666515 + ... + 21666518.

Almost surely, 2^86666066 is an apocalyptic number.

86666066 is a deficient number, since it is larger than the sum of its proper divisors (43333036).

86666066 is a wasteful number, since it uses less digits than its factorization.

86666066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43333035.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 86666066 is about 9309.4611014817. The cubic root of 86666066 is about 442.5371090417.

The spelling of 86666066 in words is "eighty-six million, six hundred sixty-six thousand, sixty-six".