666701319 has 8 divisors (see below), whose sum is σ = 891319792. Its totient is φ = 443275200.

The previous prime is 666701309. The next prime is 666701327. The reversal of 666701319 is 913107666.

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

It is not a de Polignac number, because 666701319 - 2¹² = 666697223 is a prime.

It is a super-2 number, since 2×666701319² = 888981297512679522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666701309) 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, 296782 + ... + 299019.

It is an arithmetic number, because the mean of its divisors is an integer number (111414974).

Almost surely, 2^666701319 is an apocalyptic number.

666701319 is a deficient number, since it is larger than the sum of its proper divisors (224618473).

666701319 is a wasteful number, since it uses less digits than its factorization.

666701319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596177.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 666701319 is about 25820.5600055460. The cubic root of 666701319 is about 873.5956002748.

The spelling of 666701319 in words is "six hundred sixty-six million, seven hundred one thousand, three hundred nineteen".