166764551 has 8 divisors (see below), whose sum is σ = 169768800. Its totient is φ = 163785600.

The previous prime is 166764527. The next prime is 166764557. The reversal of 166764551 is 155467661.

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 166764551 - 2¹⁴ = 166748167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166764499 and 166764508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166764557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7235 + ... + 19643.

It is an arithmetic number, because the mean of its divisors is an integer number (21221100).

Almost surely, 2^166764551 is an apocalyptic number.

166764551 is a deficient number, since it is larger than the sum of its proper divisors (3004249).

166764551 is a wasteful number, since it uses less digits than its factorization.

166764551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12649.

The product of its digits is 151200, while the sum is 41.

The square root of 166764551 is about 12913.7349748243. The cubic root of 166764551 is about 550.4289227139.

The spelling of 166764551 in words is "one hundred sixty-six million, seven hundred sixty-four thousand, five hundred fifty-one".