1660841955 has 16 divisors (see below), whose sum is σ = 2952608160. Its totient is φ = 885782304.

The previous prime is 1660841953. The next prime is 1660841989. The reversal of 1660841955 is 5591480661.

It is not a de Polignac number, because 1660841955 - 2¹ = 1660841953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1660841955.

It is not an unprimeable number, because it can be changed into a prime (1660841953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6151132 + ... + 6151401.

It is an arithmetic number, because the mean of its divisors is an integer number (184538010).

Almost surely, 2^1660841955 is an apocalyptic number.

1660841955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1660841955 is a deficient number, since it is larger than the sum of its proper divisors (1291766205).

1660841955 is a wasteful number, since it uses less digits than its factorization.

1660841955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12302547 (or 12302541 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 1660841955 is about 40753.4287514560. The cubic root of 1660841955 is about 1184.2482974947.

The spelling of 1660841955 in words is "one billion, six hundred sixty million, eight hundred forty-one thousand, nine hundred fifty-five".