66660560001051 has 32 divisors (see below), whose sum is σ = 94286715406848. Its totient is φ = 41801934915840.

The previous prime is 66660560001047. The next prime is 66660560001083. The reversal of 66660560001051 is 15010006506666.

It is not a de Polignac number, because 66660560001051 - 2² = 66660560001047 is a prime.

It is a super-2 number, since 2×66660560001051² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66660560000994 and 66660560001012.

It is not an unprimeable number, because it can be changed into a prime (66660560001031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16982800 + ... + 20536226.

It is an arithmetic number, because the mean of its divisors is an integer number (2946459856464).

Almost surely, 2^{66660560001051} is an apocalyptic number.

66660560001051 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

66660560001051 is a deficient number, since it is larger than the sum of its proper divisors (27626155405797).

66660560001051 is a wasteful number, since it uses less digits than its factorization.

66660560001051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557971.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 66660560001051 in words is "sixty-six trillion, six hundred sixty billion, five hundred sixty million, one thousand, fifty-one".