1660625059 has 4 divisors (see below), whose sum is σ = 1758308904. Its totient is φ = 1562941216.

The previous prime is 1660625011. The next prime is 1660625117. The reversal of 1660625059 is 9505260661.

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

It is a cyclic number.

It is not a de Polignac number, because 1660625059 - 2¹⁷ = 1660493987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660625359) 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, 48841897 + ... + 48841930.

It is an arithmetic number, because the mean of its divisors is an integer number (439577226).

Almost surely, 2^1660625059 is an apocalyptic number.

1660625059 is a deficient number, since it is larger than the sum of its proper divisors (97683845).

1660625059 is an equidigital number, since it uses as much as digits as its factorization.

1660625059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97683844.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 1660625059 is about 40750.7675878627. The cubic root of 1660625059 is about 1184.1967433416.

The spelling of 1660625059 in words is "one billion, six hundred sixty million, six hundred twenty-five thousand, fifty-nine".