1566165992 has 8 divisors (see below), whose sum is σ = 2936561250. Its totient is φ = 783082992.

The previous prime is 1566165983. The next prime is 1566166001. The reversal of 1566165992 is 2995616651.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1566165983) and next prime (1566166001).

It can be written as a sum of positive squares in only one way, i.e., 1566101476 + 64516 = 39574^2 + 254^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1566165992.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97885367 + ... + 97885382.

Almost surely, 2^1566165992 is an apocalyptic number.

It is an amenable number.

1566165992 is a deficient number, since it is larger than the sum of its proper divisors (1370395258).

1566165992 is a wasteful number, since it uses less digits than its factorization.

1566165992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195770755 (or 195770751 counting only the distinct ones).

The product of its digits is 874800, while the sum is 50.

The square root of 1566165992 is about 39574.8151227520. The cubic root of 1566165992 is about 1161.3040210424.

The spelling of 1566165992 in words is "one billion, five hundred sixty-six million, one hundred sixty-five thousand, nine hundred ninety-two".