66710773437 has 16 divisors (see below), whose sum is σ = 110895831552. Its totient is φ = 34654947120.

The previous prime is 66710773421. The next prime is 66710773439. The reversal of 66710773437 is 73437701766.

It is not a de Polignac number, because 66710773437 - 2⁴ = 66710773421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66710773437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66710773439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144395383 + ... + 144395844.

It is an arithmetic number, because the mean of its divisors is an integer number (6930989472).

Almost surely, 2^66710773437 is an apocalyptic number.

It is an amenable number.

66710773437 is a deficient number, since it is larger than the sum of its proper divisors (44185058115).

66710773437 is a wasteful number, since it uses less digits than its factorization.

66710773437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288791248.

The product of its (nonzero) digits is 3111696, while the sum is 51.

The spelling of 66710773437 in words is "sixty-six billion, seven hundred ten million, seven hundred seventy-three thousand, four hundred thirty-seven".