66130155 has 96 divisors (see below), whose sum is σ = 147470400. Its totient is φ = 27869184.

The previous prime is 66130147. The next prime is 66130157. The reversal of 66130155 is 55103166.

It is a happy number.

It is not a de Polignac number, because 66130155 - 2³ = 66130147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (66130157) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 85611 + ... + 86379.

It is an arithmetic number, because the mean of its divisors is an integer number (1536150).

Almost surely, 2^66130155 is an apocalyptic number.

66130155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66130155 is an abundant number, since it is smaller than the sum of its proper divisors (81340245).

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

66130155 is a wasteful number, since it uses less digits than its factorization.

66130155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 66130155 is about 8132.0449457686. The cubic root of 66130155 is about 404.3894779289.

The spelling of 66130155 in words is "sixty-six million, one hundred thirty thousand, one hundred fifty-five".