1066278421935 has 64 divisors (see below), whose sum is σ = 1920730608000. Its totient is φ = 568171542528.

The previous prime is 1066278421931. The next prime is 1066278421969. The reversal of 1066278421935 is 5391248726601.

It is a happy number.

1066278421935 is a `hidden beast` number, since 1 + 0 + 6 + 62 + 78 + 421 + 93 + 5 = 666.

1066278421935 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1066278421935 - 2² = 1066278421931 is a prime.

It is a super-2 number, since 2×1066278421935² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066278421931) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12302431 + ... + 12388799.

It is an arithmetic number, because the mean of its divisors is an integer number (30011415750).

It is a 1-persistent number, because it is pandigital, but 2⋅1066278421935 = 2132556843870 is not.

Almost surely, 2^{1066278421935} is an apocalyptic number.

1066278421935 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1066278421935 is a deficient number, since it is larger than the sum of its proper divisors (854452186065).

1066278421935 is an frugal number, since it uses more digits than its factorization.

1066278421935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87524 (or 87506 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 1066278421935 in words is "one trillion, sixty-six billion, two hundred seventy-eight million, four hundred twenty-one thousand, nine hundred thirty-five".