155520066 has 32 divisors (see below), whose sum is σ = 349534080. Its totient is φ = 45771264.

The previous prime is 155520017. The next prime is 155520067. The reversal of 155520066 is 660025551.

It is not an unprimeable number, because it can be changed into a prime (155520067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41551 + ... + 45138.

It is an arithmetic number, because the mean of its divisors is an integer number (10922940).

Almost surely, 2^155520066 is an apocalyptic number.

155520066 is an abundant number, since it is smaller than the sum of its proper divisors (194014014).

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

155520066 is a wasteful number, since it uses less digits than its factorization.

155520066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86730.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 155520066 is about 12470.7684606844. The cubic root of 155520066 is about 537.7686456601.

The spelling of 155520066 in words is "one hundred fifty-five million, five hundred twenty thousand, sixty-six".