667020907 has 16 divisors (see below), whose sum is σ = 800750592. Its totient is φ = 543232800.

The previous prime is 667020883. The next prime is 667020917. The reversal of 667020907 is 709020766.

It is a cyclic number.

It is not a de Polignac number, because 667020907 - 2¹⁹ = 666496619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667020917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10593 + ... + 38029.

It is an arithmetic number, because the mean of its divisors is an integer number (50046912).

Almost surely, 2^667020907 is an apocalyptic number.

667020907 is a deficient number, since it is larger than the sum of its proper divisors (133729685).

667020907 is a wasteful number, since it uses less digits than its factorization.

667020907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27618.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 667020907 is about 25826.7478982546. The cubic root of 667020907 is about 873.7351660563.

The spelling of 667020907 in words is "six hundred sixty-seven million, twenty thousand, nine hundred seven".