669122031 has 16 divisors (see below), whose sum is σ = 942531200. Its totient is φ = 421067808.

The previous prime is 669122029. The next prime is 669122053. The reversal of 669122031 is 130221966.

It is not a de Polignac number, because 669122031 - 2¹ = 669122029 is a prime.

It is a super-2 number, since 2×669122031² = 895448584739129922, 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 669122031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669122081) 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, 5401 + ... + 36978.

It is an arithmetic number, because the mean of its divisors is an integer number (58908200).

Almost surely, 2^669122031 is an apocalyptic number.

669122031 is a deficient number, since it is larger than the sum of its proper divisors (273409169).

669122031 is a wasteful number, since it uses less digits than its factorization.

669122031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42678.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 669122031 is about 25867.3932007073. The cubic root of 669122031 is about 874.6516299179.

Adding to 669122031 its reverse (130221966), we get a palindrome (799343997).

The spelling of 669122031 in words is "six hundred sixty-nine million, one hundred twenty-two thousand, thirty-one".