6657421277354 has 4 divisors (see below), whose sum is σ = 9986131916034. Its totient is φ = 3328710638676.

The previous prime is 6657421277329. The next prime is 6657421277363. The reversal of 6657421277354 is 4537721247566.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 5545718854225 + 1111702423129 = 2354935^2 + 1054373^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6657421277293 and 6657421277302.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1664355319337 + ... + 1664355319340.

Almost surely, 2^{6657421277354} is an apocalyptic number.

6657421277354 is a deficient number, since it is larger than the sum of its proper divisors (3328710638680).

6657421277354 is a wasteful number, since it uses less digits than its factorization.

6657421277354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328710638679.

The product of its digits is 59270400, while the sum is 59.

The spelling of 6657421277354 in words is "six trillion, six hundred fifty-seven billion, four hundred twenty-one million, two hundred seventy-seven thousand, three hundred fifty-four".