669638011 has 16 divisors (see below), whose sum is σ = 787224064. Its totient is φ = 557673984.

The previous prime is 669638009. The next prime is 669638017. The reversal of 669638011 is 110836966.

It is not a de Polignac number, because 669638011 - 2¹ = 669638009 is a prime.

It is a super-2 number, since 2×669638011² = 896830131552072242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669638017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52330 + ... + 63856.

It is an arithmetic number, because the mean of its divisors is an integer number (49201504).

Almost surely, 2^669638011 is an apocalyptic number.

669638011 is a deficient number, since it is larger than the sum of its proper divisors (117586053).

669638011 is a wasteful number, since it uses less digits than its factorization.

669638011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11770.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 669638011 is about 25877.3648387930. The cubic root of 669638011 is about 874.8763954925.

The spelling of 669638011 in words is "six hundred sixty-nine million, six hundred thirty-eight thousand, eleven".