1662001161 has 8 divisors (see below), whose sum is σ = 2216200800. Its totient is φ = 1107901152.

The previous prime is 1662001123. The next prime is 1662001199. The reversal of 1662001161 is 1611002661.

It is an interprime number because it is at equal distance from previous prime (1662001123) and next prime (1662001199).

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

It is not a de Polignac number, because 1662001161 - 2¹⁸ = 1661739017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1662001111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33765 + ... + 66813.

It is an arithmetic number, because the mean of its divisors is an integer number (277025100).

Almost surely, 2^1662001161 is an apocalyptic number.

It is an amenable number.

1662001161 is a deficient number, since it is larger than the sum of its proper divisors (554199639).

1662001161 is a wasteful number, since it uses less digits than its factorization.

1662001161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49815.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1662001161 is about 40767.6484605134. The cubic root of 1662001161 is about 1184.5237538612.

The spelling of 1662001161 in words is "one billion, six hundred sixty-two million, one thousand, one hundred sixty-one".