66736707366738 has 16 divisors (see below), whose sum is σ = 133831252310976. Its totient is φ = 22185929526000.

The previous prime is 66736707366661. The next prime is 66736707366751. The reversal of 66736707366738 is 83766370763766.

It is a super-2 number, since 2×66736707366738² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66736707366738.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14909896638 + ... + 14909901113.

It is an arithmetic number, because the mean of its divisors is an integer number (8364453269436).

Almost surely, 2^{66736707366738} is an apocalyptic number.

66736707366738 is an abundant number, since it is smaller than the sum of its proper divisors (67094544944238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66736707366738 is a wasteful number, since it uses less digits than its factorization.

66736707366738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29819798129.

The product of its (nonzero) digits is 4032758016, while the sum is 75.

The spelling of 66736707366738 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred seven million, three hundred sixty-six thousand, seven hundred thirty-eight".