101666408 has 8 divisors (see below), whose sum is σ = 190624530. Its totient is φ = 50833200.

The previous prime is 101666401. The next prime is 101666419. The reversal of 101666408 is 804666101.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 65642404 + 36024004 = 8102^2 + 6002^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (101666401) by changing a digit.

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, 6354143 + ... + 6354158.

Almost surely, 2^101666408 is an apocalyptic number.

It is an amenable number.

101666408 is a deficient number, since it is larger than the sum of its proper divisors (88958122).

101666408 is a wasteful number, since it uses less digits than its factorization.

101666408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12708307 (or 12708303 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 101666408 is about 10082.9761479436. The cubic root of 101666408 is about 466.7229533015.

The spelling of 101666408 in words is "one hundred one million, six hundred sixty-six thousand, four hundred eight".