667516307 has 4 divisors (see below), whose sum is σ = 676660440. Its totient is φ = 658372176.

The previous prime is 667516301. The next prime is 667516309. The reversal of 667516307 is 703615766.

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

It is a cyclic number.

It is not a de Polignac number, because 667516307 - 2¹⁰ = 667515283 is a prime.

It is a super-2 number, since 2×667516307² = 891156040221836498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667516301) 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, 4571957 + ... + 4572102.

It is an arithmetic number, because the mean of its divisors is an integer number (169165110).

Almost surely, 2^667516307 is an apocalyptic number.

667516307 is a deficient number, since it is larger than the sum of its proper divisors (9144133).

667516307 is an equidigital number, since it uses as much as digits as its factorization.

667516307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9144132.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 667516307 is about 25836.3369501174. The cubic root of 667516307 is about 873.9514217895.

The spelling of 667516307 in words is "six hundred sixty-seven million, five hundred sixteen thousand, three hundred seven".