165566472 has 64 divisors (see below), whose sum is σ = 421545600. Its totient is φ = 54182400.

The previous prime is 165566459. The next prime is 165566473. The reversal of 165566472 is 274665561.

It is not an unprimeable number, because it can be changed into a prime (165566473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404604 + ... + 405012.

It is an arithmetic number, because the mean of its divisors is an integer number (6586650).

Almost surely, 2^165566472 is an apocalyptic number.

165566472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165566472 is an abundant number, since it is smaller than the sum of its proper divisors (255979128).

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

165566472 is a wasteful number, since it uses less digits than its factorization.

165566472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 682 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 165566472 is about 12867.2635785547. The cubic root of 165566472 is about 549.1076129206.

The spelling of 165566472 in words is "one hundred sixty-five million, five hundred sixty-six thousand, four hundred seventy-two".