166051388 has 12 divisors (see below), whose sum is σ = 291538632. Its totient is φ = 82754640.

The previous prime is 166051387. The next prime is 166051397. The reversal of 166051388 is 883150661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166051387) 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 3 ways as a sum of consecutive naturals, for example, 66383 + ... + 68838.

It is an arithmetic number, because the mean of its divisors is an integer number (24294886).

Almost surely, 2^166051388 is an apocalyptic number.

It is an amenable number.

166051388 is a deficient number, since it is larger than the sum of its proper divisors (125487244).

166051388 is a wasteful number, since it uses less digits than its factorization.

166051388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135532 (or 135530 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 166051388 is about 12886.0928135723. The cubic root of 166051388 is about 549.6431713018.

The spelling of 166051388 in words is "one hundred sixty-six million, fifty-one thousand, three hundred eighty-eight".