667701257148 has 36 divisors (see below), whose sum is σ = 1700120123520. Its totient is φ = 220942506816.

The previous prime is 667701257141. The next prime is 667701257173. The reversal of 667701257148 is 841752107766.

667701257148 is a `hidden beast` number, since 6 + 67 + 7 + 0 + 1 + 2 + 571 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 667701257094 and 667701257103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667701257141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67685788 + ... + 67695651.

Almost surely, 2^667701257148 is an apocalyptic number.

It is an amenable number.

667701257148 is an abundant number, since it is smaller than the sum of its proper divisors (1032418866372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667701257148 is a wasteful number, since it uses less digits than its factorization.

667701257148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135381586 (or 135381581 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 54.

The spelling of 667701257148 in words is "six hundred sixty-seven billion, seven hundred one million, two hundred fifty-seven thousand, one hundred forty-eight".