66052380 has 48 divisors (see below), whose sum is σ = 185389344. Its totient is φ = 17571840.

The previous prime is 66052369. The next prime is 66052381. The reversal of 66052380 is 8325066.

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 (66052381) 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, 30204 + ... + 32316.

It is an arithmetic number, because the mean of its divisors is an integer number (3862278).

Almost surely, 2^66052380 is an apocalyptic number.

66052380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66052380 is an abundant number, since it is smaller than the sum of its proper divisors (119336964).

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

66052380 is a wasteful number, since it uses less digits than its factorization.

66052380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646 (or 2644 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66052380 is about 8127.2615314139. The cubic root of 66052380 is about 404.2308829602.

The spelling of 66052380 in words is "sixty-six million, fifty-two thousand, three hundred eighty".