155668867 has 2 divisors, whose sum is σ = 155668868. Its totient is φ = 155668866.

The previous prime is 155668831. The next prime is 155668951. The reversal of 155668867 is 768866551.

It is a weak prime.

It is an emirp because it is prime and its reverse (768866551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155668867 - 2⁷ = 155668739 is a prime.

It is not a weakly prime, because it can be changed into another prime (155698867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77834433 + 77834434.

It is an arithmetic number, because the mean of its divisors is an integer number (77834434).

Almost surely, 2^155668867 is an apocalyptic number.

155668867 is a deficient number, since it is larger than the sum of its proper divisors (1).

155668867 is an equidigital number, since it uses as much as digits as its factorization.

155668867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 52.

The square root of 155668867 is about 12476.7330259167. The cubic root of 155668867 is about 537.9401026447.

The spelling of 155668867 in words is "one hundred fifty-five million, six hundred sixty-eight thousand, eight hundred sixty-seven".