67006521426 has 16 divisors (see below), whose sum is σ = 144321738624. Its totient is φ = 20617391184.

The previous prime is 67006521419. The next prime is 67006521431. The reversal of 67006521426 is 62412560076.

67006521426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×67006521426² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

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, 429528906 + ... + 429529061.

It is an arithmetic number, because the mean of its divisors is an integer number (9020108664).

Almost surely, 2^67006521426 is an apocalyptic number.

67006521426 is an abundant number, since it is smaller than the sum of its proper divisors (77315217198).

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

67006521426 is a wasteful number, since it uses less digits than its factorization.

67006521426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859057985.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 67006521426 in words is "sixty-seven billion, six million, five hundred twenty-one thousand, four hundred twenty-six".