9957478678 has 8 divisors (see below), whose sum is σ = 17069963472. Its totient is φ = 4267490856.

The previous prime is 9957478673. The next prime is 9957478679. The reversal of 9957478678 is 8768747599.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9957478673) 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, 355624225 + ... + 355624252.

It is an arithmetic number, because the mean of its divisors is an integer number (2133745434).

Almost surely, 2^9957478678 is an apocalyptic number.

9957478678 is a deficient number, since it is larger than the sum of its proper divisors (7112484794).

9957478678 is a wasteful number, since it uses less digits than its factorization.

9957478678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711248486.

The product of its digits is 213373440, while the sum is 70.

The square root of 9957478678 is about 99787.1669003585. The cubic root of 9957478678 is about 2151.3767045687.

The spelling of 9957478678 in words is "nine billion, nine hundred fifty-seven million, four hundred seventy-eight thousand, six hundred seventy-eight".