667979475 has 48 divisors (see below), whose sum is σ = 1179448320. Its totient is φ = 332841600.

The previous prime is 667979471. The next prime is 667979479. The reversal of 667979475 is 574979766.

It is an interprime number because it is at equal distance from previous prime (667979471) and next prime (667979479).

It is not a de Polignac number, because 667979475 - 2² = 667979471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667979471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62472 + ... + 72378.

It is an arithmetic number, because the mean of its divisors is an integer number (24571840).

Almost surely, 2^667979475 is an apocalyptic number.

667979475 is a deficient number, since it is larger than the sum of its proper divisors (511468845).

667979475 is a wasteful number, since it uses less digits than its factorization.

667979475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9980 (or 9975 counting only the distinct ones).

The product of its digits is 20003760, while the sum is 60.

The square root of 667979475 is about 25845.2988955438. The cubic root of 667979475 is about 874.1535106080.

The spelling of 667979475 in words is "six hundred sixty-seven million, nine hundred seventy-nine thousand, four hundred seventy-five".