660155023 has 8 divisors (see below), whose sum is σ = 721987920. Its totient is φ = 598625280.

The previous prime is 660155009. The next prime is 660155051. The reversal of 660155023 is 320551066.

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

It is not a de Polignac number, because 660155023 - 2⁵ = 660154991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660154982 and 660155000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660156023) 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, 71218 + ... + 79951.

It is an arithmetic number, because the mean of its divisors is an integer number (90248490).

Almost surely, 2^660155023 is an apocalyptic number.

660155023 is a deficient number, since it is larger than the sum of its proper divisors (61832897).

660155023 is a wasteful number, since it uses less digits than its factorization.

660155023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151577.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 660155023 is about 25693.4821112281. The cubic root of 660155023 is about 870.7269315255.

The spelling of 660155023 in words is "six hundred sixty million, one hundred fifty-five thousand, twenty-three".