16664166629 has 4 divisors (see below), whose sum is σ = 18179090880. Its totient is φ = 15149242380.

The previous prime is 16664166601. The next prime is 16664166641. The reversal of 16664166629 is 92666146661.

It is a happy number.

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 16664166629 - 2¹⁶ = 16664101093 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 (16664166829) 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, 757462109 + ... + 757462130.

It is an arithmetic number, because the mean of its divisors is an integer number (4544772720).

Almost surely, 2^16664166629 is an apocalyptic number.

It is an amenable number.

16664166629 is a deficient number, since it is larger than the sum of its proper divisors (1514924251).

16664166629 is a wasteful number, since it uses less digits than its factorization.

16664166629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514924250.

The product of its digits is 3359232, while the sum is 53.

The spelling of 16664166629 in words is "sixteen billion, six hundred sixty-four million, one hundred sixty-six thousand, six hundred twenty-nine".