1667313381 has 8 divisors (see below), whose sum is σ = 2224922080. Its totient is φ = 1110623472.

The previous prime is 1667313371. The next prime is 1667313383. The reversal of 1667313381 is 1833137661.

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

It is not a de Polignac number, because 1667313381 - 2⁶ = 1667313317 is a prime.

It is a super-2 number, since 2×1667313381² = 5559867820923302322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667313383) 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, 225451 + ... + 232728.

It is an arithmetic number, because the mean of its divisors is an integer number (278115260).

Almost surely, 2^1667313381 is an apocalyptic number.

It is an amenable number.

1667313381 is a deficient number, since it is larger than the sum of its proper divisors (557608699).

1667313381 is a wasteful number, since it uses less digits than its factorization.

1667313381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459395.

The product of its digits is 54432, while the sum is 39.

The square root of 1667313381 is about 40832.7488788105. The cubic root of 1667313381 is about 1185.7844345913.

The spelling of 1667313381 in words is "one billion, six hundred sixty-seven million, three hundred thirteen thousand, three hundred eighty-one".