66212642860754 has 16 divisors (see below), whose sum is σ = 106959100024728. Its totient is φ = 30559619776512.

The previous prime is 66212642860739. The next prime is 66212642860783. The reversal of 66212642860754 is 45706824621266.

66212642860754 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6281464501225 + 59931178359529 = 2506285^2 + 7741523^2 .

It is a super-2 number, since 2×66212642860754² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66212642860693 and 66212642860702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12197684 + ... + 16769280.

Almost surely, 2^{66212642860754} is an apocalyptic number.

66212642860754 is a deficient number, since it is larger than the sum of its proper divisors (40746457163974).

66212642860754 is a wasteful number, since it uses less digits than its factorization.

66212642860754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5128669.

The product of its (nonzero) digits is 46448640, while the sum is 59.

The spelling of 66212642860754 in words is "sixty-six trillion, two hundred twelve billion, six hundred forty-two million, eight hundred sixty thousand, seven hundred fifty-four".