1660441651 has 8 divisors (see below), whose sum is σ = 1811755008. Its totient is φ = 1509189000.

The previous prime is 1660441649. The next prime is 1660441681. The reversal of 1660441651 is 1561440661.

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

It is not a de Polignac number, because 1660441651 - 2¹ = 1660441649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660441681) 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, 56946 + ... + 81016.

It is an arithmetic number, because the mean of its divisors is an integer number (226469376).

Almost surely, 2^1660441651 is an apocalyptic number.

1660441651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1660441651 is a deficient number, since it is larger than the sum of its proper divisors (151313357).

1660441651 is a wasteful number, since it uses less digits than its factorization.

1660441651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30353.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1660441651 is about 40748.5171632048. The cubic root of 1660441651 is about 1184.1531454704.

The spelling of 1660441651 in words is "one billion, six hundred sixty million, four hundred forty-one thousand, six hundred fifty-one".