67006831540 has 48 divisors (see below), whose sum is σ = 153918293760. Its totient is φ = 24300766080.

The previous prime is 67006831499. The next prime is 67006831543. The reversal of 67006831540 is 4513860076.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 67006831493 and 67006831502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67006831543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326220 + ... + 490339.

It is an arithmetic number, because the mean of its divisors is an integer number (3206631120).

Almost surely, 2^67006831540 is an apocalyptic number.

It is an amenable number.

67006831540 is an abundant number, since it is smaller than the sum of its proper divisors (86911462220).

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

67006831540 is a wasteful number, since it uses less digits than its factorization.

67006831540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816952 (or 816950 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 67006831540 in words is "sixty-seven billion, six million, eight hundred thirty-one thousand, five hundred forty".