1966641488 has 40 divisors (see below), whose sum is σ = 4495188480. Its totient is φ = 815656320.

The previous prime is 1966641463. The next prime is 1966641511. The reversal of 1966641488 is 8841466691.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279743 + ... + 286686.

It is an arithmetic number, because the mean of its divisors is an integer number (112379712).

Almost surely, 2^1966641488 is an apocalyptic number.

It is an amenable number.

1966641488 is an abundant number, since it is smaller than the sum of its proper divisors (2528546992).

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

1966641488 is a wasteful number, since it uses less digits than its factorization.

1966641488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566475 (or 566469 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 53.

The square root of 1966641488 is about 44346.8317695864. The cubic root of 1966641488 is about 1252.8768911582.

The spelling of 1966641488 in words is "one billion, nine hundred sixty-six million, six hundred forty-one thousand, four hundred eighty-eight".