66102404748601 has 8 divisors (see below), whose sum is σ = 71187694711560. Its totient is φ = 61017184728192.

The previous prime is 66102404748593. The next prime is 66102404748607. The reversal of 66102404748601 is 10684740420166.

It can be written as a sum of positive squares in 4 ways, for example, as 2941619463225 + 63160785285376 = 1715115^2 + 7947376^2 .

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 66102404748601 - 2³ = 66102404748593 is a prime.

It is a super-2 number, since 2×66102404748601² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66102404748607) 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, 15514510 + ... + 19310743.

It is an arithmetic number, because the mean of its divisors is an integer number (8898461838945).

Almost surely, 2^{66102404748601} is an apocalyptic number.

It is an amenable number.

66102404748601 is a deficient number, since it is larger than the sum of its proper divisors (5085289962959).

66102404748601 is a wasteful number, since it uses less digits than its factorization.

66102404748601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34971275.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 66102404748601 in words is "sixty-six trillion, one hundred two billion, four hundred four million, seven hundred forty-eight thousand, six hundred one".