16577661 has 8 divisors (see below), whose sum is σ = 22617760. Its totient is φ = 10794672.

The previous prime is 16577629. The next prime is 16577677. The reversal of 16577661 is 16677561.

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

It is not a de Polignac number, because 16577661 - 2⁵ = 16577629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16577611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64126 + ... + 64383.

It is an arithmetic number, because the mean of its divisors is an integer number (2827220).

Almost surely, 2^16577661 is an apocalyptic number.

It is an amenable number.

16577661 is a deficient number, since it is larger than the sum of its proper divisors (6040099).

16577661 is a wasteful number, since it uses less digits than its factorization.

16577661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128555.

The product of its digits is 52920, while the sum is 39.

The square root of 16577661 is about 4071.5673886109. The cubic root of 16577661 is about 254.9809597471.

The spelling of 16577661 in words is "sixteen million, five hundred seventy-seven thousand, six hundred sixty-one".