1668520370 has 32 divisors (see below), whose sum is σ = 3290849856. Its totient is φ = 604052800.

The previous prime is 1668520367. The next prime is 1668520391. The reversal of 1668520370 is 730258661.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8441 + ... + 58380.

It is an arithmetic number, because the mean of its divisors is an integer number (102839058).

Almost surely, 2^1668520370 is an apocalyptic number.

1668520370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668520370 is a deficient number, since it is larger than the sum of its proper divisors (1622329486).

1668520370 is a wasteful number, since it uses less digits than its factorization.

1668520370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67066.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 1668520370 is about 40847.5258736683. The cubic root of 1668520370 is about 1186.0705002989.

The spelling of 1668520370 in words is "one billion, six hundred sixty-eight million, five hundred twenty thousand, three hundred seventy".