16620261 has 12 divisors (see below), whose sum is σ = 25778592. Its totient is φ = 9497208.

The previous prime is 16620239. The next prime is 16620301. The reversal of 16620261 is 16202661.

It is not a de Polignac number, because 16620261 - 2⁵ = 16620229 is a prime.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16620361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56385 + ... + 56678.

It is an arithmetic number, because the mean of its divisors is an integer number (2148216).

Almost surely, 2^16620261 is an apocalyptic number.

It is an amenable number.

16620261 is a deficient number, since it is larger than the sum of its proper divisors (9158331).

16620261 is a wasteful number, since it uses less digits than its factorization.

16620261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113080 (or 113073 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 16620261 is about 4076.7954326897. The cubic root of 16620261 is about 255.1991830914.

The spelling of 16620261 in words is "sixteen million, six hundred twenty thousand, two hundred sixty-one".