161660326 has 32 divisors (see below), whose sum is σ = 261506880. Its totient is φ = 74793600.

The previous prime is 161660281. The next prime is 161660329. The reversal of 161660326 is 623066161.

It is a super-2 number, since 2×161660326² = 52268122004852552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161660329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151836 + ... + 152896.

It is an arithmetic number, because the mean of its divisors is an integer number (8172090).

Almost surely, 2^161660326 is an apocalyptic number.

161660326 is a deficient number, since it is larger than the sum of its proper divisors (99846554).

161660326 is a wasteful number, since it uses less digits than its factorization.

161660326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 161660326 is about 12714.5714044949. The cubic root of 161660326 is about 544.7549059265.

The spelling of 161660326 in words is "one hundred sixty-one million, six hundred sixty thousand, three hundred twenty-six".