101666540 has 24 divisors (see below), whose sum is σ = 213902640. Its totient is φ = 40589888.

The previous prime is 101666527. The next prime is 101666557. The reversal of 101666540 is 45666101.

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, 6746 + ... + 15774.

It is an arithmetic number, because the mean of its divisors is an integer number (8912610).

Almost surely, 2^101666540 is an apocalyptic number.

101666540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101666540 is an abundant number, since it is smaller than the sum of its proper divisors (112236100).

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

101666540 is a wasteful number, since it uses less digits than its factorization.

101666540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9601 (or 9599 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 101666540 is about 10082.9826936279. The cubic root of 101666540 is about 466.7231552935.

The spelling of 101666540 in words is "one hundred one million, six hundred sixty-six thousand, five hundred forty".