166266747 has 24 divisors (see below), whose sum is σ = 252938400. Its totient is φ = 105038208.

The previous prime is 166266743. The next prime is 166266761. The reversal of 166266747 is 747662661.

It is a happy number.

166266747 is a `hidden beast` number, since 16 + 626 + 6 + 7 + 4 + 7 = 666.

It is not a de Polignac number, because 166266747 - 2² = 166266743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166266743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18879 + ... + 26247.

It is an arithmetic number, because the mean of its divisors is an integer number (10539100).

Almost surely, 2^166266747 is an apocalyptic number.

166266747 is a deficient number, since it is larger than the sum of its proper divisors (86671653).

166266747 is a wasteful number, since it uses less digits than its factorization.

166266747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7507 (or 7504 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 166266747 is about 12894.4463626788. The cubic root of 166266747 is about 549.8806870667.

The spelling of 166266747 in words is "one hundred sixty-six million, two hundred sixty-six thousand, seven hundred forty-seven".