667870411 has 4 divisors (see below), whose sum is σ = 719245072. Its totient is φ = 616495752.

The previous prime is 667870409. The next prime is 667870439. The reversal of 667870411 is 114078766.

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 667870411 - 2¹ = 667870409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667870471) 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, 25687311 + ... + 25687336.

It is an arithmetic number, because the mean of its divisors is an integer number (179811268).

Almost surely, 2^667870411 is an apocalyptic number.

667870411 is a deficient number, since it is larger than the sum of its proper divisors (51374661).

667870411 is a wasteful number, since it uses less digits than its factorization.

667870411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51374660.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 667870411 is about 25843.1888705709. The cubic root of 667870411 is about 874.1059323658.

The spelling of 667870411 in words is "six hundred sixty-seven million, eight hundred seventy thousand, four hundred eleven".