66615060 has 48 divisors (see below), whose sum is σ = 186967872. Its totient is φ = 17721600.

The previous prime is 66615049. The next prime is 66615067. The reversal of 66615060 is 6051666.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66615067) 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, 30195 + ... + 32325.

It is an arithmetic number, because the mean of its divisors is an integer number (3895164).

Almost surely, 2^66615060 is an apocalyptic number.

66615060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66615060 is an abundant number, since it is smaller than the sum of its proper divisors (120352812).

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

66615060 is a wasteful number, since it uses less digits than its factorization.

66615060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664 (or 2662 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 66615060 is about 8161.8049474366. The cubic root of 66615060 is about 405.3754786389.

The spelling of 66615060 in words is "sixty-six million, six hundred fifteen thousand, sixty".