77667966397 has 8 divisors (see below), whose sum is σ = 88854812352. Its totient is φ = 66503976000.

The previous prime is 77667966367. The next prime is 77667966443. The reversal of 77667966397 is 79366976677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77667966397 - 2¹¹ = 77667964349 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 (77667966307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5706604 + ... + 5720197.

It is an arithmetic number, because the mean of its divisors is an integer number (11106851544).

Almost surely, 2^77667966397 is an apocalyptic number.

It is an amenable number.

77667966397 is a deficient number, since it is larger than the sum of its proper divisors (11186845955).

77667966397 is a wasteful number, since it uses less digits than its factorization.

77667966397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11427779.

The product of its digits is 756142128, while the sum is 73.

The spelling of 77667966397 in words is "seventy-seven billion, six hundred sixty-seven million, nine hundred sixty-six thousand, three hundred ninety-seven".