1966909656 has 32 divisors (see below), whose sum is σ = 5206526640. Its totient is φ = 617069568.

The previous prime is 1966909619. The next prime is 1966909739. The reversal of 1966909656 is 6569096691.

1966909656 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1966909596 and 1966909605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2410021 + ... + 2410836.

Almost surely, 2^1966909656 is an apocalyptic number.

It is an amenable number.

1966909656 is an abundant number, since it is smaller than the sum of its proper divisors (3239616984).

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

1966909656 is a wasteful number, since it uses less digits than its factorization.

1966909656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820883 (or 4820879 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 57.

The square root of 1966909656 is about 44349.8551970579. The cubic root of 1966909656 is about 1252.9338353144.

The spelling of 1966909656 in words is "one billion, nine hundred sixty-six million, nine hundred nine thousand, six hundred fifty-six".