16652661 has 8 divisors (see below), whose sum is σ = 22223424. Its totient is φ = 11091840.

The previous prime is 16652659. The next prime is 16652663. The reversal of 16652661 is 16625661.

It is an interprime number because it is at equal distance from previous prime (16652659) and next prime (16652663).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16652661 - 2¹ = 16652659 is a prime.

It is a super-2 number, since 2×16652661² = 554622236761842, which contains 22 as substring.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16652663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3456 + ... + 6726.

It is an arithmetic number, because the mean of its divisors is an integer number (2777928).

Almost surely, 2^16652661 is an apocalyptic number.

It is an amenable number.

16652661 is a deficient number, since it is larger than the sum of its proper divisors (5570763).

16652661 is a wasteful number, since it uses less digits than its factorization.

16652661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4971.

The product of its digits is 12960, while the sum is 33.

The square root of 16652661 is about 4080.7672072786. The cubic root of 16652661 is about 255.3649062496.

Subtracting from 16652661 its reverse (16625661), we obtain a cube (27000 = 30³).

The spelling of 16652661 in words is "sixteen million, six hundred fifty-two thousand, six hundred sixty-one".