666672259 has 8 divisors (see below), whose sum is σ = 745017840. Its totient is φ = 591283200.

The previous prime is 666672199. The next prime is 666672263. The reversal of 666672259 is 952276666.

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 666672259 - 2¹¹ = 666670211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666672059) 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, 738654 + ... + 739555.

It is an arithmetic number, because the mean of its divisors is an integer number (93127230).

Almost surely, 2^666672259 is an apocalyptic number.

666672259 is a deficient number, since it is larger than the sum of its proper divisors (78345581).

666672259 is a wasteful number, since it uses less digits than its factorization.

666672259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478261.

The product of its digits is 1632960, while the sum is 49.

The square root of 666672259 is about 25819.9972695583. The cubic root of 666672259 is about 873.5829074060.

It can be divided in two parts, 66667225 and 9, that multiplied together give a square (600005025 = 24495²).

The spelling of 666672259 in words is "six hundred sixty-six million, six hundred seventy-two thousand, two hundred fifty-nine".