66900060 has 96 divisors (see below), whose sum is σ = 209428800. Its totient is φ = 17729280.

The previous prime is 66900059. The next prime is 66900089. The reversal of 66900060 is 6000966.

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

It is a junction number, because it is equal to n+sod(n) for n = 66899997 and 66900033.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123390 + ... + 123930.

It is an arithmetic number, because the mean of its divisors is an integer number (2181550).

Almost surely, 2^66900060 is an apocalyptic number.

66900060 is a gapful number since it is divisible by the number (60) 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 66900060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104714400).

66900060 is an abundant number, since it is smaller than the sum of its proper divisors (142528740).

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

66900060 is a wasteful number, since it uses less digits than its factorization.

66900060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 66900060 is about 8179.2456864921. The cubic root of 66900060 is about 405.9527637216.

The spelling of 66900060 in words is "sixty-six million, nine hundred thousand, sixty".