667540330 has 8 divisors (see below), whose sum is σ = 1201572612. Its totient is φ = 267016128.

The previous prime is 667540271. The next prime is 667540331. The reversal of 667540330 is 33045766.

It can be written as a sum of positive squares in 2 ways, for example, as 655001649 + 12538681 = 25593^2 + 3541^2 .

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

It is a super-2 number, since 2×667540330² = 891220184353017800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (667540331) 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, 33377007 + ... + 33377026.

Almost surely, 2^667540330 is an apocalyptic number.

667540330 is a deficient number, since it is larger than the sum of its proper divisors (534032282).

667540330 is a wasteful number, since it uses less digits than its factorization.

667540330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66754040.

The product of its (nonzero) digits is 45360, while the sum is 34.

The square root of 667540330 is about 25836.8018531706. The cubic root of 667540330 is about 873.9619057696.

The spelling of 667540330 in words is "six hundred sixty-seven million, five hundred forty thousand, three hundred thirty".