667033394 has 4 divisors (see below), whose sum is σ = 1000550094. Its totient is φ = 333516696.

The previous prime is 667033351. The next prime is 667033397. The reversal of 667033394 is 493330766.

667033394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493330766 = 2 ⋅246665383.

It can be written as a sum of positive squares in only one way, i.e., 650913169 + 16120225 = 25513^2 + 4015^2 .

It is a super-2 number, since 2×667033394² = 889867097422318472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (667033397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166758347 + ... + 166758350.

Almost surely, 2^667033394 is an apocalyptic number.

667033394 is a deficient number, since it is larger than the sum of its proper divisors (333516700).

667033394 is a wasteful number, since it uses less digits than its factorization.

667033394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333516699.

The product of its (nonzero) digits is 244944, while the sum is 41.

The square root of 667033394 is about 25826.9896426200. The cubic root of 667033394 is about 873.7406182907.

The spelling of 667033394 in words is "six hundred sixty-seven million, thirty-three thousand, three hundred ninety-four".