999766667994 has 32 divisors (see below), whose sum is σ = 2027441359680. Its totient is φ = 328633200000.

The previous prime is 999766667993. The next prime is 999766668029. The reversal of 999766667994 is 499766667999.

It is a self number, because there is not a number n which added to its sum of digits gives 999766667994.

It is not an unprimeable number, because it can be changed into a prime (999766667993) 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, 3484507 + ... + 3760494.

It is an arithmetic number, because the mean of its divisors is an integer number (63357542490).

Almost surely, 2^999766667994 is an apocalyptic number.

999766667994 is an abundant number, since it is smaller than the sum of its proper divisors (1027674691686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999766667994 is a wasteful number, since it uses less digits than its factorization.

999766667994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7245326.

The product of its digits is 14999390784, while the sum is 87.

The spelling of 999766667994 in words is "nine hundred ninety-nine billion, seven hundred sixty-six million, six hundred sixty-seven thousand, nine hundred ninety-four".