8742662478 has 32 divisors (see below), whose sum is σ = 21194334720. Its totient is φ = 2649291480.

The previous prime is 8742662447. The next prime is 8742662483.

It is a happy number.

8742662478 is a `hidden beast` number, since 8 + 7 + 4 + 2 + 6 + 624 + 7 + 8 = 666.

8742662478 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7358550 + ... + 7359737.

It is an arithmetic number, because the mean of its divisors is an integer number (662322960).

Almost surely, 2^8742662478 is an apocalyptic number.

8742662478 is an abundant number, since it is smaller than the sum of its proper divisors (12451672242).

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

8742662478 is a wasteful number, since it uses less digits than its factorization.

8742662478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14718309 (or 14718303 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 54.

The square root of 8742662478 is about 93502.2057386883. The cubic root of 8742662478 is about 2060.0664884123.

The spelling of 8742662478 in words is "eight billion, seven hundred forty-two million, six hundred sixty-two thousand, four hundred seventy-eight".