155667 has 8 divisors (see below), whose sum is σ = 218560. Its totient is φ = 98280.

The previous prime is 155663. The next prime is 155671. The reversal of 155667 is 766551.

It is an interprime number because it is at equal distance from previous prime (155663) and next prime (155671).

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

It is not a de Polignac number, because 155667 - 2² = 155663 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (155663) 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, 1309 + ... + 1422.

It is an arithmetic number, because the mean of its divisors is an integer number (27320).

2¹⁵⁵⁶⁶⁷ is an apocalyptic number.

155667 is a deficient number, since it is larger than the sum of its proper divisors (62893).

155667 is a wasteful number, since it uses less digits than its factorization.

155667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753.

The product of its digits is 6300, while the sum is 30.

The square root of 155667 is about 394.5465751974. The cubic root of 155667 is about 53.7937952058.

The spelling of 155667 in words is "one hundred fifty-five thousand, six hundred sixty-seven".