1669349690 has 64 divisors (see below), whose sum is σ = 3290112000. Its totient is φ = 607487040.

The previous prime is 1669349687. The next prime is 1669349699. The reversal of 1669349690 is 969439661.

It is a super-2 number, since 2×1669349690² = 5573456775006192200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1669349699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 817691 + ... + 819729.

It is an arithmetic number, because the mean of its divisors is an integer number (51408000).

Almost surely, 2^1669349690 is an apocalyptic number.

1669349690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1669349690 is a deficient number, since it is larger than the sum of its proper divisors (1620762310).

1669349690 is a wasteful number, since it uses less digits than its factorization.

1669349690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235.

The product of its (nonzero) digits is 1889568, while the sum is 53.

The square root of 1669349690 is about 40857.6760229947. The cubic root of 1669349690 is about 1186.2669755877.

The spelling of 1669349690 in words is "one billion, six hundred sixty-nine million, three hundred forty-nine thousand, six hundred ninety".