66266442 has 48 divisors (see below), whose sum is σ = 165851712. Its totient is φ = 18898560.

The previous prime is 66266429. The next prime is 66266461. The reversal of 66266442 is 24466266.

66266442 is a `hidden beast` number, since 6 + 6 + 2 + 6 + 644 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 66266397 and 66266406.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6478 + ... + 13209.

It is an arithmetic number, because the mean of its divisors is an integer number (3455244).

Almost surely, 2^66266442 is an apocalyptic number.

66266442 is an abundant number, since it is smaller than the sum of its proper divisors (99585270).

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

66266442 is a wasteful number, since it uses less digits than its factorization.

66266442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19723 (or 19720 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 66266442 is about 8140.4202594215. The cubic root of 66266442 is about 404.6670881025.

The spelling of 66266442 in words is "sixty-six million, two hundred sixty-six thousand, four hundred forty-two".