66666023044 has 6 divisors (see below), whose sum is σ = 116665540334. Its totient is φ = 33333011520.

The previous prime is 66666023029. The next prime is 66666023101. The reversal of 66666023044 is 44032066666.

It can be written as a sum of positive squares in only one way, i.e., 53564473600 + 13101549444 = 231440^2 + 114462^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8333252877 + ... + 8333252884.

Almost surely, 2^66666023044 is an apocalyptic number.

It is an amenable number.

66666023044 is a deficient number, since it is larger than the sum of its proper divisors (49999517290).

66666023044 is a wasteful number, since it uses less digits than its factorization.

66666023044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666505765 (or 16666505763 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 43.

The spelling of 66666023044 in words is "sixty-six billion, six hundred sixty-six million, twenty-three thousand, forty-four".