1669340085 has 48 divisors (see below), whose sum is σ = 3111412032. Its totient is φ = 762048000.

The previous prime is 1669340081. The next prime is 1669340087. The reversal of 1669340085 is 5800439661.

It is not a de Polignac number, because 1669340085 - 2² = 1669340081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669340081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 771405 + ... + 773565.

It is an arithmetic number, because the mean of its divisors is an integer number (64821084).

Almost surely, 2^1669340085 is an apocalyptic number.

1669340085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1669340085 is a deficient number, since it is larger than the sum of its proper divisors (1442071947).

1669340085 is a wasteful number, since it uses less digits than its factorization.

1669340085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234 (or 3227 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1669340085 is about 40857.5584806532. The cubic root of 1669340085 is about 1186.2647004270.

The spelling of 1669340085 in words is "one billion, six hundred sixty-nine million, three hundred forty thousand, eighty-five".