16662053761 has 4 divisors (see below), whose sum is σ = 16712392624. Its totient is φ = 16611714900.

The previous prime is 16662053731. The next prime is 16662053773. The reversal of 16662053761 is 16735026661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16662053761 - 2¹⁷ = 16661922689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16662053701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25168935 + ... + 25169596.

It is an arithmetic number, because the mean of its divisors is an integer number (4178098156).

Almost surely, 2^16662053761 is an apocalyptic number.

It is an amenable number.

16662053761 is a deficient number, since it is larger than the sum of its proper divisors (50338863).

16662053761 is an equidigital number, since it uses as much as digits as its factorization.

16662053761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50338862.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 16662053761 in words is "sixteen billion, six hundred sixty-two million, fifty-three thousand, seven hundred sixty-one".