672888168787 has 4 divisors (see below), whose sum is σ = 696091209120. Its totient is φ = 649685128456.

The previous prime is 672888168781. The next prime is 672888168809. The reversal of 672888168787 is 787861888276.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-672888168787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672888168781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11601520123 + ... + 11601520180.

It is an arithmetic number, because the mean of its divisors is an integer number (174022802280).

Almost surely, 2^672888168787 is an apocalyptic number.

672888168787 is a deficient number, since it is larger than the sum of its proper divisors (23203040333).

672888168787 is a wasteful number, since it uses less digits than its factorization.

672888168787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23203040332.

The product of its digits is 809238528, while the sum is 76.

The spelling of 672888168787 in words is "six hundred seventy-two billion, eight hundred eighty-eight million, one hundred sixty-eight thousand, seven hundred eighty-seven".