155477667 has 4 divisors (see below), whose sum is σ = 207303560. Its totient is φ = 103651776.

The previous prime is 155477659. The next prime is 155477681. The reversal of 155477667 is 766774551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766774551 = 3 ⋅255591517.

It is not a de Polignac number, because 155477667 - 2³ = 155477659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155477867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25912942 + ... + 25912947.

It is an arithmetic number, because the mean of its divisors is an integer number (51825890).

Almost surely, 2^155477667 is an apocalyptic number.

155477667 is a deficient number, since it is larger than the sum of its proper divisors (51825893).

155477667 is an equidigital number, since it uses as much as digits as its factorization.

155477667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51825892.

The product of its digits is 1234800, while the sum is 48.

The square root of 155477667 is about 12469.0684094683. The cubic root of 155477667 is about 537.7197710984.

The spelling of 155477667 in words is "one hundred fifty-five million, four hundred seventy-seven thousand, six hundred sixty-seven".