155566656 has 168 divisors, whose sum is σ = 528848320. Its totient is φ = 44416512.

The previous prime is 155566639. The next prime is 155566673. The reversal of 155566656 is 656665551.

It is an interprime number because it is at equal distance from previous prime (155566639) and next prime (155566673).

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108150 + ... + 109578.

Almost surely, 2^155566656 is an apocalyptic number.

155566656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155566656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264424160).

155566656 is an abundant number, since it is smaller than the sum of its proper divisors (373281664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155566656 is an equidigital number, since it uses as much as digits as its factorization.

155566656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463 (or 1441 counting only the distinct ones).

The product of its digits is 810000, while the sum is 45.

The square root of 155566656 is about 12472.6362890930. The cubic root of 155566656 is about 537.8223410670.

The spelling of 155566656 in words is "one hundred fifty-five million, five hundred sixty-six thousand, six hundred fifty-six".