1662011 has 8 divisors (see below), whose sum is σ = 1802640. Its totient is φ = 1523232.

The previous prime is 1662007. The next prime is 1662013. The reversal of 1662011 is 1102661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1662011 - 2² = 1662007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662013) 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, 1880 + ... + 2618.

It is an arithmetic number, because the mean of its divisors is an integer number (225330).

2^1662011 is an apocalyptic number.

1662011 is a deficient number, since it is larger than the sum of its proper divisors (140629).

1662011 is a wasteful number, since it uses less digits than its factorization.

1662011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1662011 is about 1289.1900558102. The cubic root of 1662011 is about 118.4526091306.

Adding to 1662011 its reverse (1102661), we get a palindrome (2764672).

The spelling of 1662011 in words is "one million, six hundred sixty-two thousand, eleven".