162061661 has 2 divisors, whose sum is σ = 162061662. Its totient is φ = 162061660.

The previous prime is 162061649. The next prime is 162061721. The reversal of 162061661 is 166160261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139688761 + 22372900 = 11819^2 + 4730^2 .

It is a cyclic number.

It is not a de Polignac number, because 162061661 - 2⁶ = 162061597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162061061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81030830 + 81030831.

It is an arithmetic number, because the mean of its divisors is an integer number (81030831).

Almost surely, 2^162061661 is an apocalyptic number.

It is an amenable number.

162061661 is a deficient number, since it is larger than the sum of its proper divisors (1).

162061661 is an equidigital number, since it uses as much as digits as its factorization.

162061661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 162061661 is about 12730.3441037546. The cubic root of 162061661 is about 545.2053329485.

The spelling of 162061661 in words is "one hundred sixty-two million, sixty-one thousand, six hundred sixty-one".