67666505501 has 48 divisors (see below), whose sum is σ = 82022485632. Its totient is φ = 54638064000.

The previous prime is 67666505479. The next prime is 67666505527. The reversal of 67666505501 is 10550566676.

It is not a de Polignac number, because 67666505501 - 2¹⁴ = 67666489117 is a prime.

It is a super-2 number, since 2×67666505501² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67666504501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57784646 + ... + 57785816.

It is an arithmetic number, because the mean of its divisors is an integer number (1708801784).

Almost surely, 2^67666505501 is an apocalyptic number.

It is an amenable number.

67666505501 is a deficient number, since it is larger than the sum of its proper divisors (14355980131).

67666505501 is a wasteful number, since it uses less digits than its factorization.

67666505501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 47.

The spelling of 67666505501 in words is "sixty-seven billion, six hundred sixty-six million, five hundred five thousand, five hundred one".