1669623494 has 16 divisors (see below), whose sum is σ = 3122413056. Its totient is φ = 650502600.

The previous prime is 1669623457. The next prime is 1669623503. The reversal of 1669623494 is 4943269661.

It is a super-2 number, since 2×1669623494² = 5575285223433536072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5420702 + ... + 5421009.

It is an arithmetic number, because the mean of its divisors is an integer number (195150816).

Almost surely, 2^1669623494 is an apocalyptic number.

1669623494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1669623494 is a deficient number, since it is larger than the sum of its proper divisors (1452789562).

1669623494 is a wasteful number, since it uses less digits than its factorization.

1669623494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10841731.

The product of its digits is 1679616, while the sum is 50.

The square root of 1669623494 is about 40861.0265901384. The cubic root of 1669623494 is about 1186.3318285638.

The spelling of 1669623494 in words is "one billion, six hundred sixty-nine million, six hundred twenty-three thousand, four hundred ninety-four".