21607166040 has 64 divisors (see below), whose sum is σ = 65060789760. Its totient is φ = 5740640640.

The previous prime is 21607165999. The next prime is 21607166051. The reversal of 21607166040 is 4066170612.

It is a junction number, because it is equal to n+sod(n) for n = 21607165992 and 21607166010.

It is a congruent number.

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, 299694 + ... + 364733.

It is an arithmetic number, because the mean of its divisors is an integer number (1016574840).

Almost surely, 2^21607166040 is an apocalyptic number.

21607166040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21607166040 is an abundant number, since it is smaller than the sum of its proper divisors (43453623720).

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

21607166040 is a wasteful number, since it uses less digits than its factorization.

21607166040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664712 (or 664708 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The spelling of 21607166040 in words is "twenty-one billion, six hundred seven million, one hundred sixty-six thousand, forty".