1660413655 has 4 divisors (see below), whose sum is σ = 1992496392. Its totient is φ = 1328330920.

The previous prime is 1660413611. The next prime is 1660413659. The reversal of 1660413655 is 5563140661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1660413655 - 2⁷ = 1660413527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660413659) 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, 166041361 + ... + 166041370.

It is an arithmetic number, because the mean of its divisors is an integer number (498124098).

Almost surely, 2^1660413655 is an apocalyptic number.

1660413655 is a deficient number, since it is larger than the sum of its proper divisors (332082737).

1660413655 is an equidigital number, since it uses as much as digits as its factorization.

1660413655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332082736.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 1660413655 is about 40748.1736400541. The cubic root of 1660413655 is about 1184.1464902655.

The spelling of 1660413655 in words is "one billion, six hundred sixty million, four hundred thirteen thousand, six hundred fifty-five".