66737473767 has 96 divisors (see below), whose sum is σ = 106156080576. Its totient is φ = 40241664000.

The previous prime is 66737473753. The next prime is 66737473849. The reversal of 66737473767 is 76737473766.

66737473767 is a `hidden beast` number, since 6 + 67 + 37 + 473 + 76 + 7 = 666.

It is not a de Polignac number, because 66737473767 - 2¹² = 66737469671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66737473717) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 78238113 + ... + 78238965.

It is an arithmetic number, because the mean of its divisors is an integer number (1105792506).

Almost surely, 2^66737473767 is an apocalyptic number.

66737473767 is a deficient number, since it is larger than the sum of its proper divisors (39418606809).

66737473767 is a wasteful number, since it uses less digits than its factorization.

66737473767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121 (or 1118 counting only the distinct ones).

The product of its digits is 130691232, while the sum is 63.

Subtracting 66737473767 from its reverse (76737473766), we obtain a palindrome (9999999999).

The spelling of 66737473767 in words is "sixty-six billion, seven hundred thirty-seven million, four hundred seventy-three thousand, seven hundred sixty-seven".