1966475640 has 64 divisors (see below), whose sum is σ = 5982543360. Its totient is φ = 517005440.

The previous prime is 1966475611. The next prime is 1966475677. The reversal of 1966475640 is 465746691.

It is a self number, because there is not a number n which added to its sum of digits gives 1966475640.

It is a congruent number.

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, 106884 + ... + 123923.

It is an arithmetic number, because the mean of its divisors is an integer number (93477240).

Almost surely, 2^1966475640 is an apocalyptic number.

1966475640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1966475640 is an abundant number, since it is smaller than the sum of its proper divisors (4016067720).

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

1966475640 is a wasteful number, since it uses less digits than its factorization.

1966475640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230892 (or 230888 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 1966475640 is about 44344.9618333357. The cubic root of 1966475640 is about 1252.8416715602.

The spelling of 1966475640 in words is "one billion, nine hundred sixty-six million, four hundred seventy-five thousand, six hundred forty".