66830155 has 16 divisors (see below), whose sum is σ = 93024000. Its totient is φ = 45140832.

The previous prime is 66830149. The next prime is 66830161. The reversal of 66830155 is 55103866.

It is an interprime number because it is at equal distance from previous prime (66830149) and next prime (66830161).

It is a cyclic number.

It is not a de Polignac number, because 66830155 - 2³ = 66830147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66830155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11905 + ... + 16594.

It is an arithmetic number, because the mean of its divisors is an integer number (5814000).

Almost surely, 2^66830155 is an apocalyptic number.

66830155 is a deficient number, since it is larger than the sum of its proper divisors (26193845).

66830155 is a wasteful number, since it uses less digits than its factorization.

66830155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28578.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 66830155 is about 8174.9712537721. The cubic root of 66830155 is about 405.8113188163.

The spelling of 66830155 in words is "sixty-six million, eight hundred thirty thousand, one hundred fifty-five".