16620146 has 4 divisors (see below), whose sum is σ = 24930222. Its totient is φ = 8310072.

The previous prime is 16620143. The next prime is 16620157. The reversal of 16620146 is 64102661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15642025 + 978121 = 3955^2 + 989^2 .

It is a super-2 number, since 2×16620146² = 552458506122632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16620143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4155035 + ... + 4155038.

Almost surely, 2^16620146 is an apocalyptic number.

16620146 is a deficient number, since it is larger than the sum of its proper divisors (8310076).

16620146 is an equidigital number, since it uses as much as digits as its factorization.

16620146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8310075.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 16620146 is about 4076.7813284502. The cubic root of 16620146 is about 255.1985944931.

The spelling of 16620146 in words is "sixteen million, six hundred twenty thousand, one hundred forty-six".