66261622067 has 8 divisors (see below), whose sum is σ = 69752203200. Its totient is φ = 62771353704.

The previous prime is 66261622061. The next prime is 66261622073. The reversal of 66261622067 is 76022616266.

66261622067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66261622061) and next prime (66261622073).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66261622067 - 2¹⁰ = 66261621043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66261622061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447284 + ... + 576702.

It is an arithmetic number, because the mean of its divisors is an integer number (8719025400).

Almost surely, 2^66261622067 is an apocalyptic number.

66261622067 is a deficient number, since it is larger than the sum of its proper divisors (3490581133).

66261622067 is a wasteful number, since it uses less digits than its factorization.

66261622067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156385.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 66261622067 in words is "sixty-six billion, two hundred sixty-one million, six hundred twenty-two thousand, sixty-seven".