166097770 has 8 divisors (see below), whose sum is σ = 298976004. Its totient is φ = 66439104.

The previous prime is 166097749. The next prime is 166097779. The reversal of 166097770 is 77790661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 162537001 + 3560769 = 12749^2 + 1887^2 .

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

It is not an unprimeable number, because it can be changed into a prime (166097779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8304879 + ... + 8304898.

Almost surely, 2^166097770 is an apocalyptic number.

166097770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166097770 is a deficient number, since it is larger than the sum of its proper divisors (132878234).

166097770 is a wasteful number, since it uses less digits than its factorization.

166097770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16609784.

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 166097770 is about 12887.8923800597. The cubic root of 166097770 is about 549.6943425619.

The spelling of 166097770 in words is "one hundred sixty-six million, ninety-seven thousand, seven hundred seventy".