669531142 has 16 divisors (see below), whose sum is σ = 1148884992. Its totient is φ = 286662600.

The previous prime is 669531133. The next prime is 669531143. The reversal of 669531142 is 241135966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669531143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8038 + ... + 37465.

It is an arithmetic number, because the mean of its divisors is an integer number (71805312).

Almost surely, 2^669531142 is an apocalyptic number.

669531142 is a deficient number, since it is larger than the sum of its proper divisors (479353850).

669531142 is a wasteful number, since it uses less digits than its factorization.

669531142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46563.

The product of its digits is 38880, while the sum is 37.

The square root of 669531142 is about 25875.2998436733. The cubic root of 669531142 is about 874.8298518684.

The spelling of 669531142 in words is "six hundred sixty-nine million, five hundred thirty-one thousand, one hundred forty-two".