669038511 has 4 divisors (see below), whose sum is σ = 892051352. Its totient is φ = 446025672.

The previous prime is 669038509. The next prime is 669038521. The reversal of 669038511 is 115830966.

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

It is not a de Polignac number, because 669038511 - 2¹ = 669038509 is a prime.

It is a super-2 number, since 2×669038511² = 895225058402194242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 669038511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669038521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111506416 + ... + 111506421.

It is an arithmetic number, because the mean of its divisors is an integer number (223012838).

Almost surely, 2^669038511 is an apocalyptic number.

669038511 is a deficient number, since it is larger than the sum of its proper divisors (223012841).

669038511 is a wasteful number, since it uses less digits than its factorization.

669038511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223012840.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 669038511 is about 25865.7787626818. The cubic root of 669038511 is about 874.6152369829.

The spelling of 669038511 in words is "six hundred sixty-nine million, thirty-eight thousand, five hundred eleven".