166006551 has 8 divisors (see below), whose sum is σ = 221806080. Its totient is φ = 110439032.

The previous prime is 166006549. The next prime is 166006567. The reversal of 166006551 is 155600661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166006551 - 2¹ = 166006549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166006151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56325 + ... + 59198.

It is an arithmetic number, because the mean of its divisors is an integer number (27725760).

Almost surely, 2^166006551 is an apocalyptic number.

166006551 is a deficient number, since it is larger than the sum of its proper divisors (55799529).

166006551 is a wasteful number, since it uses less digits than its factorization.

166006551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116005.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 166006551 is about 12884.3529523217. The cubic root of 166006551 is about 549.5936955147.

The spelling of 166006551 in words is "one hundred sixty-six million, six thousand, five hundred fifty-one".