669235746 has 32 divisors (see below), whose sum is σ = 1441693440. Its totient is φ = 206421264.

The previous prime is 669235739. The next prime is 669235793. The reversal of 669235746 is 647532966.

It is a junction number, because it is equal to n+sod(n) for n = 669235695 and 669235704.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63360 + ... + 73163.

It is an arithmetic number, because the mean of its divisors is an integer number (45052920).

Almost surely, 2^669235746 is an apocalyptic number.

669235746 is an abundant number, since it is smaller than the sum of its proper divisors (772457694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669235746 is a wasteful number, since it uses less digits than its factorization.

669235746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136590.

The product of its digits is 1632960, while the sum is 48.

The square root of 669235746 is about 25869.5911448171. The cubic root of 669235746 is about 874.7011751288.

The spelling of 669235746 in words is "six hundred sixty-nine million, two hundred thirty-five thousand, seven hundred forty-six".