667233397 has 4 divisors (see below), whose sum is σ = 667347660. Its totient is φ = 667119136.

The previous prime is 667233389. The next prime is 667233401. The reversal of 667233397 is 793332766.

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

It can be written as a sum of positive squares in 2 ways, for example, as 138509361 + 528724036 = 11769^2 + 22994^2 .

It is a cyclic number.

It is not a de Polignac number, because 667233397 - 2³ = 667233389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667230397) 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, 47872 + ... + 60217.

It is an arithmetic number, because the mean of its divisors is an integer number (166836915).

Almost surely, 2^667233397 is an apocalyptic number.

It is an amenable number.

667233397 is a deficient number, since it is larger than the sum of its proper divisors (114263).

667233397 is a wasteful number, since it uses less digits than its factorization.

667233397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114262.

The product of its digits is 857304, while the sum is 46.

The square root of 667233397 is about 25830.8613290382. The cubic root of 667233397 is about 873.8279368985.

The spelling of 667233397 in words is "six hundred sixty-seven million, two hundred thirty-three thousand, three hundred ninety-seven".