10661620 has 24 divisors (see below), whose sum is σ = 22514688. Its totient is φ = 4240800.

The previous prime is 10661611. The next prime is 10661653. The reversal of 10661620 is 2616601.

It is a super-2 number, since 2×10661620² = 227340282048800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10661591 and 10661600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2425 + ... + 5215.

It is an arithmetic number, because the mean of its divisors is an integer number (938112).

Almost surely, 2^10661620 is an apocalyptic number.

10661620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10661620 is an abundant number, since it is smaller than the sum of its proper divisors (11853068).

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

10661620 is a wasteful number, since it uses less digits than its factorization.

10661620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991 (or 2989 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 10661620 is about 3265.2136224143. The cubic root of 10661620 is about 220.0937616870.

The spelling of 10661620 in words is "ten million, six hundred sixty-one thousand, six hundred twenty".