656166155 has 8 divisors (see below), whose sum is σ = 788126352. Its totient is φ = 524448288.

The previous prime is 656166089. The next prime is 656166163. The reversal of 656166155 is 551661656.

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

It is a cyclic number.

It is not a de Polignac number, because 656166155 - 2⁸ = 656165899 is a prime.

It is a super-3 number, since 3×656166155³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54569 + ... + 65498.

It is an arithmetic number, because the mean of its divisors is an integer number (98515794).

Almost surely, 2^656166155 is an apocalyptic number.

656166155 is a deficient number, since it is larger than the sum of its proper divisors (131960197).

656166155 is a wasteful number, since it uses less digits than its factorization.

656166155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121165.

The product of its digits is 162000, while the sum is 41.

The square root of 656166155 is about 25615.7403757924. The cubic root of 656166155 is about 868.9696504448.

The spelling of 656166155 in words is "six hundred fifty-six million, one hundred sixty-six thousand, one hundred fifty-five".