101566606440 has 64 divisors (see below), whose sum is σ = 328138272000. Its totient is φ = 25001010432.

The previous prime is 101566606409. The next prime is 101566606541. The reversal of 101566606440 is 44606665101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32551840 + ... + 32554959.

It is an arithmetic number, because the mean of its divisors is an integer number (5127160500).

Almost surely, 2^101566606440 is an apocalyptic number.

101566606440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101566606440 is an abundant number, since it is smaller than the sum of its proper divisors (226571665560).

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

101566606440 is a wasteful number, since it uses less digits than its factorization.

101566606440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65106826 (or 65106822 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 101566606440 in words is "one hundred one billion, five hundred sixty-six million, six hundred six thousand, four hundred forty".