1566064956 has 96 divisors (see below), whose sum is σ = 3954871872. Its totient is φ = 480522240.

The previous prime is 1566064891. The next prime is 1566064961. The reversal of 1566064956 is 6594606651.

It is a super-2 number, since 2×1566064956² = 4905118892822563872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3944550 + ... + 3944946.

It is an arithmetic number, because the mean of its divisors is an integer number (41196582).

Almost surely, 2^1566064956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1566064956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1977435936).

1566064956 is an abundant number, since it is smaller than the sum of its proper divisors (2388806916).

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

1566064956 is a wasteful number, since it uses less digits than its factorization.

1566064956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The square root of 1566064956 is about 39573.5385832503. The cubic root of 1566064956 is about 1161.2790479474.

The spelling of 1566064956 in words is "one billion, five hundred sixty-six million, sixty-four thousand, nine hundred fifty-six".