166625247 has 8 divisors (see below), whose sum is σ = 222663600. Its totient is φ = 110835200.

The previous prime is 166625243. The next prime is 166625257. The reversal of 166625247 is 742526661.

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 166625247 - 2² = 166625243 is a prime.

It is a super-2 number, since 2×166625247² = 55527945875622018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166625243) 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, 60504 + ... + 63197.

It is an arithmetic number, because the mean of its divisors is an integer number (27832950).

Almost surely, 2^166625247 is an apocalyptic number.

166625247 is a deficient number, since it is larger than the sum of its proper divisors (56038353).

166625247 is a wasteful number, since it uses less digits than its factorization.

166625247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124153.

The product of its digits is 120960, while the sum is 39.

The square root of 166625247 is about 12908.3402108869. The cubic root of 166625247 is about 550.2756161301.

The spelling of 166625247 in words is "one hundred sixty-six million, six hundred twenty-five thousand, two hundred forty-seven".