84157697966 has 4 divisors (see below), whose sum is σ = 126236546952. Its totient is φ = 42078848982.

The previous prime is 84157697959. The next prime is 84157697989. The reversal of 84157697966 is 66979675148.

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

It is a junction number, because it is equal to n+sod(n) for n = 84157697896 and 84157697905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21039424490 + ... + 21039424493.

It is an arithmetic number, because the mean of its divisors is an integer number (31559136738).

Almost surely, 2^84157697966 is an apocalyptic number.

84157697966 is a deficient number, since it is larger than the sum of its proper divisors (42078848986).

84157697966 is a wasteful number, since it uses less digits than its factorization.

84157697966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42078848985.

The product of its digits is 137168640, while the sum is 68.

The spelling of 84157697966 in words is "eighty-four billion, one hundred fifty-seven million, six hundred ninety-seven thousand, nine hundred sixty-six".