67420502691 has 16 divisors (see below), whose sum is σ = 95535741600. Its totient is φ = 42145791488.

The previous prime is 67420502683. The next prime is 67420502729. The reversal of 67420502691 is 19620502476.

It is a cyclic number.

It is not a de Polignac number, because 67420502691 - 2³ = 67420502683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67420502641) 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, 2443476 + ... + 2470913.

It is an arithmetic number, because the mean of its divisors is an integer number (5970983850).

Almost surely, 2^67420502691 is an apocalyptic number.

67420502691 is a deficient number, since it is larger than the sum of its proper divisors (28115238909).

67420502691 is a wasteful number, since it uses less digits than its factorization.

67420502691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4914678.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 67420502691 in words is "sixty-seven billion, four hundred twenty million, five hundred two thousand, six hundred ninety-one".