165570550 has 12 divisors (see below), whose sum is σ = 307961316. Its totient is φ = 66228200.

The previous prime is 165570547. The next prime is 165570551. The reversal of 165570550 is 55075561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165570551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1655656 + ... + 1655755.

It is an arithmetic number, because the mean of its divisors is an integer number (25663443).

Almost surely, 2^165570550 is an apocalyptic number.

165570550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165570550 is a deficient number, since it is larger than the sum of its proper divisors (142390766).

165570550 is a wasteful number, since it uses less digits than its factorization.

165570550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311423 (or 3311418 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 34.

The square root of 165570550 is about 12867.4220417300. The cubic root of 165570550 is about 549.1121211652.

The spelling of 165570550 in words is "one hundred sixty-five million, five hundred seventy thousand, five hundred fifty".