101666660 has 24 divisors (see below), whose sum is σ = 213694656. Its totient is φ = 40629600.

The previous prime is 101666651. The next prime is 101666683. The reversal of 101666660 is 66666101.

It is a super-2 number, since 2×101666660² = 20672219511111200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34235 + ... + 37085.

It is an arithmetic number, because the mean of its divisors is an integer number (8903944).

Almost surely, 2^101666660 is an apocalyptic number.

101666660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101666660 is an abundant number, since it is smaller than the sum of its proper divisors (112027996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101666660 is a wasteful number, since it uses less digits than its factorization.

101666660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643 (or 4641 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 101666660 is about 10082.9886442463. The cubic root of 101666660 is about 466.7233389224.

It can be divided in two parts, 1016 and 66660, that added together give a palindrome (67676).

The spelling of 101666660 in words is "one hundred one million, six hundred sixty-six thousand, six hundred sixty".