101666655 has 24 divisors (see below), whose sum is σ = 176802912. Its totient is φ = 54043584.

The previous prime is 101666651. The next prime is 101666683. The reversal of 101666655 is 556666101.

It is not a de Polignac number, because 101666655 - 2² = 101666651 is a prime.

It is a super-2 number, since 2×101666655² = 20672217477778050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101666651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10702 + ... + 17828.

It is an arithmetic number, because the mean of its divisors is an integer number (7366788).

Almost surely, 2^101666655 is an apocalyptic number.

101666655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

101666655 is a deficient number, since it is larger than the sum of its proper divisors (75136257).

101666655 is a wasteful number, since it uses less digits than its factorization.

101666655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7455 (or 7452 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 101666655 is about 10082.9883963039. The cubic root of 101666655 is about 466.7233312712.

The spelling of 101666655 in words is "one hundred one million, six hundred sixty-six thousand, six hundred fifty-five".