66060040 has 64 divisors (see below), whose sum is σ = 153648000. Its totient is φ = 25546752.

The previous prime is 66060031. The next prime is 66060053. The reversal of 66060040 is 4006066.

It is a junction number, because it is equal to n+sod(n) for n = 66059993 and 66060020.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331861 + ... + 332059.

It is an arithmetic number, because the mean of its divisors is an integer number (2400750).

Almost surely, 2^66060040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66060040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76824000).

66060040 is an abundant number, since it is smaller than the sum of its proper divisors (87587960).

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

66060040 is a wasteful number, since it uses less digits than its factorization.

66060040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 66060040 is about 8127.7327711976. The cubic root of 66060040 is about 404.2465083819.

The spelling of 66060040 in words is "sixty-six million, sixty thousand, forty", and thus it is an eban number.