1660694 has 8 divisors (see below), whose sum is σ = 2846928. Its totient is φ = 711720.

The previous prime is 1660691. The next prime is 1660697. The reversal of 1660694 is 4960661.

1660694 = 97² + 98² + ... + 180².

It is an interprime number because it is at equal distance from previous prime (1660691) and next prime (1660697).

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

It is a nialpdrome in base 6.

It is a zygodrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 1660694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59297 + ... + 59324.

It is an arithmetic number, because the mean of its divisors is an integer number (355866).

2^1660694 is an apocalyptic number.

1660694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1660694 is a deficient number, since it is larger than the sum of its proper divisors (1186234).

1660694 is a wasteful number, since it uses less digits than its factorization.

1660694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118630.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1660694 is about 1288.6791687616. The cubic root of 1660694 is about 118.4213130460.

The spelling of 1660694 in words is "one million, six hundred sixty thousand, six hundred ninety-four".