1866957696 has 96 divisors (see below), whose sum is σ = 5388757920. Its totient is φ = 620421120.

The previous prime is 1866957667. The next prime is 1866957707. The reversal of 1866957696 is 6967596681.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404361 + ... + 408951.

It is an arithmetic number, because the mean of its divisors is an integer number (56132895).

Almost surely, 2^1866957696 is an apocalyptic number.

1866957696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1866957696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2694378960).

1866957696 is an abundant number, since it is smaller than the sum of its proper divisors (3521800224).

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

1866957696 is a wasteful number, since it uses less digits than its factorization.

1866957696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4964 (or 4949 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The square root of 1866957696 is about 43208.3058682008. The cubic root of 1866957696 is about 1231.3404858268.

The spelling of 1866957696 in words is "one billion, eight hundred sixty-six million, nine hundred fifty-seven thousand, six hundred ninety-six".