667223725627751 has 16 divisors (see below), whose sum is σ = 690646448388960. Its totient is φ = 643828685283840.

The previous prime is 667223725627733. The next prime is 667223725627793. The reversal of 667223725627751 is 157726527322766.

It is a cyclic number.

It is not a de Polignac number, because 667223725627751 - 2³⁸ = 666948847720807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667223625627751) 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, 3261600596 + ... + 3261805158.

It is an arithmetic number, because the mean of its divisors is an integer number (43165403024310).

Almost surely, 2^{667223725627751} is an apocalyptic number.

667223725627751 is a deficient number, since it is larger than the sum of its proper divisors (23422722761209).

667223725627751 is a wasteful number, since it uses less digits than its factorization.

667223725627751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271666.

The product of its digits is 622339200, while the sum is 68.

The spelling of 667223725627751 in words is "six hundred sixty-seven trillion, two hundred twenty-three billion, seven hundred twenty-five million, six hundred twenty-seven thousand, seven hundred fifty-one".