166030551 has 24 divisors (see below), whose sum is σ = 255668400. Its totient is φ = 103462656.

The previous prime is 166030547. The next prime is 166030559. The reversal of 166030551 is 155030661.

It is a happy number.

166030551 is a `hidden beast` number, since 1 + 6 + 603 + 0 + 5 + 51 = 666.

It is not a de Polignac number, because 166030551 - 2² = 166030547 is a prime.

It is a super-2 number, since 2×166030551² = 55132287730727202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166030559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19156 + ... + 26438.

It is an arithmetic number, because the mean of its divisors is an integer number (10652850).

Almost surely, 2^166030551 is an apocalyptic number.

166030551 is a deficient number, since it is larger than the sum of its proper divisors (89637849).

166030551 is a wasteful number, since it uses less digits than its factorization.

166030551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7455 (or 7452 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 166030551 is about 12885.2842809152. The cubic root of 166030551 is about 549.6201796364.

The spelling of 166030551 in words is "one hundred sixty-six million, thirty thousand, five hundred fifty-one".