66767704007667 has 48 divisors (see below), whose sum is σ = 102526543300608. Its totient is φ = 38497474229760.

The previous prime is 66767704007623. The next prime is 66767704007677. The reversal of 66767704007667 is 76670040776766.

It is not a de Polignac number, because 66767704007667 - 2¹⁹ = 66767703483379 is a prime.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66767704007677) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15446959 + ... + 19291032.

It is an arithmetic number, because the mean of its divisors is an integer number (2135969652096).

Almost surely, 2^{66767704007667} is an apocalyptic number.

66767704007667 is a deficient number, since it is larger than the sum of its proper divisors (35758839292941).

66767704007667 is a wasteful number, since it uses less digits than its factorization.

66767704007667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34738260 (or 34738247 counting only the distinct ones).

The product of its (nonzero) digits is 522764928, while the sum is 69.

The spelling of 66767704007667 in words is "sixty-six trillion, seven hundred sixty-seven billion, seven hundred four million, seven thousand, six hundred sixty-seven".