66015460 has 24 divisors (see below), whose sum is σ = 158437440. Its totient is φ = 22633824.

The previous prime is 66015431. The next prime is 66015473. The reversal of 66015460 is 6451066.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235630 + ... + 235909.

It is an arithmetic number, because the mean of its divisors is an integer number (6601560).

Almost surely, 2^66015460 is an apocalyptic number.

It is an amenable number.

66015460 is an abundant number, since it is smaller than the sum of its proper divisors (92421980).

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

66015460 is a wasteful number, since it uses less digits than its factorization.

66015460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471555 (or 471553 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66015460 is about 8124.9898461475. The cubic root of 66015460 is about 404.1555539274.

The spelling of 66015460 in words is "sixty-six million, fifteen thousand, four hundred sixty".