667070381 has 8 divisors (see below), whose sum is σ = 673284864. Its totient is φ = 660885120.

The previous prime is 667070377. The next prime is 667070387. The reversal of 667070381 is 183070766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667070381 - 2² = 667070377 is a prime.

It is a super-2 number, since 2×667070381² = 889965786414970322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667070387) 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, 39965 + ... + 54141.

It is an arithmetic number, because the mean of its divisors is an integer number (84160608).

Almost surely, 2^667070381 is an apocalyptic number.

It is an amenable number.

667070381 is a deficient number, since it is larger than the sum of its proper divisors (6214483).

667070381 is a wasteful number, since it uses less digits than its factorization.

667070381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14611.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 667070381 is about 25827.7056859490. The cubic root of 667070381 is about 873.7567676306.

The spelling of 667070381 in words is "six hundred sixty-seven million, seventy thousand, three hundred eighty-one".