1667668361 has 8 divisors (see below), whose sum is σ = 1756093920. Its totient is φ = 1579308192.

The previous prime is 1667668319. The next prime is 1667668381. The reversal of 1667668361 is 1638667661.

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 1667668361 - 2³⁰ = 593926537 is a prime.

It is a super-2 number, since 2×1667668361² = 5562235524560852642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1667668381) 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, 41246 + ... + 70968.

It is an arithmetic number, because the mean of its divisors is an integer number (219511740).

Almost surely, 2^1667668361 is an apocalyptic number.

It is an amenable number.

1667668361 is a deficient number, since it is larger than the sum of its proper divisors (88425559).

1667668361 is a wasteful number, since it uses less digits than its factorization.

1667668361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32695.

The product of its digits is 1306368, while the sum is 50.

The square root of 1667668361 is about 40837.0954035666. The cubic root of 1667668361 is about 1185.8685819176.

The spelling of 1667668361 in words is "one billion, six hundred sixty-seven million, six hundred sixty-eight thousand, three hundred sixty-one".