155660001 has 8 divisors (see below), whose sum is σ = 237196224. Its totient is φ = 88948560.

The previous prime is 155659991. The next prime is 155660003. The reversal of 155660001 is 100066551.

155660001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 155660001 - 2⁶ = 155659937 is a prime.

It is a super-2 number, since 2×155660001² = 48460071822640002, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155660003) 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, 3706170 + ... + 3706211.

It is an arithmetic number, because the mean of its divisors is an integer number (29649528).

Almost surely, 2^155660001 is an apocalyptic number.

It is an amenable number.

155660001 is a deficient number, since it is larger than the sum of its proper divisors (81536223).

155660001 is an equidigital number, since it uses as much as digits as its factorization.

155660001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7412391.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 155660001 is about 12476.3777195146. The cubic root of 155660001 is about 537.9298897966.

The spelling of 155660001 in words is "one hundred fifty-five million, six hundred sixty thousand, one".