1660067 has 4 divisors (see below), whose sum is σ = 1757736. Its totient is φ = 1562400.

The previous prime is 1660063. The next prime is 1660069. The reversal of 1660067 is 7600661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7600661 = 61 ⋅124601.

It is a cyclic number.

It is not a de Polignac number, because 1660067 - 2² = 1660063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660063) 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, 48809 + ... + 48842.

It is an arithmetic number, because the mean of its divisors is an integer number (439434).

2^1660067 is an apocalyptic number.

1660067 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1660067 is a deficient number, since it is larger than the sum of its proper divisors (97669).

1660067 is an equidigital number, since it uses as much as digits as its factorization.

1660067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97668.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 1660067 is about 1288.4358734528. The cubic root of 1660067 is about 118.4064077294.

The spelling of 1660067 in words is "one million, six hundred sixty thousand, sixty-seven".