78377369966 has 8 divisors (see below), whose sum is σ = 134361205680. Its totient is φ = 33590301408.

The previous prime is 78377369957. The next prime is 78377369971. The reversal of 78377369966 is 66996377387.

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

It is a super-2 number, since 2×78377369966² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78377369966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2799191771 + ... + 2799191798.

It is an arithmetic number, because the mean of its divisors is an integer number (16795150710).

Almost surely, 2^78377369966 is an apocalyptic number.

78377369966 is a deficient number, since it is larger than the sum of its proper divisors (55983835714).

78377369966 is a wasteful number, since it uses less digits than its factorization.

78377369966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5598383578.

The product of its digits is 432081216, while the sum is 71.

The spelling of 78377369966 in words is "seventy-eight billion, three hundred seventy-seven million, three hundred sixty-nine thousand, nine hundred sixty-six".