667296400694 has 16 divisors (see below), whose sum is σ = 1247930931456. Its totient is φ = 259985610600.

The previous prime is 667296400691. The next prime is 667296400697. The reversal of 667296400694 is 496004692766.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (667296400691) and next prime (667296400697).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667296400691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2166546602 + ... + 2166546909.

It is an arithmetic number, because the mean of its divisors is an integer number (77995683216).

Almost surely, 2^667296400694 is an apocalyptic number.

667296400694 is a deficient number, since it is larger than the sum of its proper divisors (580634530762).

667296400694 is a wasteful number, since it uses less digits than its factorization.

667296400694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4333093531.

The product of its (nonzero) digits is 23514624, while the sum is 59.

The spelling of 667296400694 in words is "six hundred sixty-seven billion, two hundred ninety-six million, four hundred thousand, six hundred ninety-four".