155000066 has 16 divisors (see below), whose sum is σ = 252605304. Its totient is φ = 70904064.

The previous prime is 155000063. The next prime is 155000107. The reversal of 155000066 is 660000551.

It can be written as a sum of positive squares in 4 ways, for example, as 90535225 + 64464841 = 9515^2 + 8029^2 .

It is not an unprimeable number, because it can be changed into a prime (155000063) 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, 23441 + ... + 29316.

Almost surely, 2^155000066 is an apocalyptic number.

155000066 is a deficient number, since it is larger than the sum of its proper divisors (97605238).

155000066 is a wasteful number, since it uses less digits than its factorization.

155000066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52885.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 155000066 is about 12449.9022486122. The cubic root of 155000066 is about 537.1686117377.

The spelling of 155000066 in words is "one hundred fifty-five million, sixty-six", and thus it is an aban number.