660700019 has 8 divisors (see below), whose sum is σ = 799502688. Its totient is φ = 533001600.

The previous prime is 660700013. The next prime is 660700043. The reversal of 660700019 is 910007066.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 660700019 - 2⁸ = 660699763 is a prime.

It is a super-2 number, since 2×660700019² = 873049030213200722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660699964 and 660700000.

It is not an unprimeable number, because it can be changed into a prime (660700013) 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, 2775932 + ... + 2776169.

It is an arithmetic number, because the mean of its divisors is an integer number (99937836).

Almost surely, 2^660700019 is an apocalyptic number.

660700019 is a deficient number, since it is larger than the sum of its proper divisors (138802669).

660700019 is a wasteful number, since it uses less digits than its factorization.

660700019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552125.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 660700019 is about 25704.0856480055. The cubic root of 660700019 is about 870.9664773648.

The spelling of 660700019 in words is "six hundred sixty million, seven hundred thousand, nineteen".