66261042 has 24 divisors (see below), whose sum is σ = 143742144. Its totient is φ = 22059864.

The previous prime is 66261029. The next prime is 66261059. The reversal of 66261042 is 24016266.

It is a happy number.

66261042 is a `hidden beast` number, since 6 + 6 + 2 + 610 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 66260997 and 66261015.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17403 + ... + 20865.

It is an arithmetic number, because the mean of its divisors is an integer number (5989256).

Almost surely, 2^66261042 is an apocalyptic number.

66261042 is an abundant number, since it is smaller than the sum of its proper divisors (77481102).

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

66261042 is a wasteful number, since it uses less digits than its factorization.

66261042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4534 (or 4531 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 66261042 is about 8140.0885744567. The cubic root of 66261042 is about 404.6560958035.

The spelling of 66261042 in words is "sixty-six million, two hundred sixty-one thousand, forty-two".