67475611640 has 32 divisors (see below), whose sum is σ = 151834372560. Its totient is φ = 26987712000.

The previous prime is 67475611633. The next prime is 67475611657. The reversal of 67475611640 is 4611657476.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent 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, 386240 + ... + 533040.

Almost surely, 2^67475611640 is an apocalyptic number.

It is an amenable number.

67475611640 is an abundant number, since it is smaller than the sum of its proper divisors (84358760920).

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

67475611640 is a wasteful number, since it uses less digits than its factorization.

67475611640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158303 (or 158299 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 67475611640 in words is "sixty-seven billion, four hundred seventy-five million, six hundred eleven thousand, six hundred forty".