667506033 has 6 divisors (see below), whose sum is σ = 964175394. Its totient is φ = 445004016.

The previous prime is 667506019. The next prime is 667506053. The reversal of 667506033 is 330605766.

It can be written as a sum of positive squares in only one way, i.e., 406909584 + 260596449 = 20172^2 + 16143^2 .

It is not a de Polignac number, because 667506033 - 2⁴ = 667506017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667506053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37083660 + ... + 37083677.

It is an arithmetic number, because the mean of its divisors is an integer number (160695899).

Almost surely, 2^667506033 is an apocalyptic number.

It is an amenable number.

667506033 is a deficient number, since it is larger than the sum of its proper divisors (296669361).

667506033 is a wasteful number, since it uses less digits than its factorization.

667506033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74167343 (or 74167340 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 36.

The square root of 667506033 is about 25836.1381208570. The cubic root of 667506033 is about 873.9469379924.

The spelling of 667506033 in words is "six hundred sixty-seven million, five hundred six thousand, thirty-three".