667072449 has 8 divisors (see below), whose sum is σ = 988255520. Its totient is φ = 444714948.

The previous prime is 667072429. The next prime is 667072489. The reversal of 667072449 is 944270766.

It is not a de Polignac number, because 667072449 - 2²⁰ = 666023873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (667072429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12353167 + ... + 12353220.

It is an arithmetic number, because the mean of its divisors is an integer number (123531940).

Almost surely, 2^667072449 is an apocalyptic number.

It is an amenable number.

667072449 is a deficient number, since it is larger than the sum of its proper divisors (321183071).

667072449 is a wasteful number, since it uses less digits than its factorization.

667072449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24706396 (or 24706390 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 667072449 is about 25827.7457204457. The cubic root of 667072449 is about 873.7576705473.

The spelling of 667072449 in words is "six hundred sixty-seven million, seventy-two thousand, four hundred forty-nine".