667151413421 has 8 divisors (see below), whose sum is σ = 673303333560. Its totient is φ = 661000061952.

The previous prime is 667151413351. The next prime is 667151413427. The reversal of 667151413421 is 124314151766.

667151413421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 504222127396 + 162929286025 = 710086^2 + 403645^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 667151413421 - 2³⁸ = 392273506477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667151413427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2428181 + ... + 2688933.

It is an arithmetic number, because the mean of its divisors is an integer number (84162916695).

Almost surely, 2^667151413421 is an apocalyptic number.

It is an amenable number.

667151413421 is a deficient number, since it is larger than the sum of its proper divisors (6151920139).

667151413421 is a wasteful number, since it uses less digits than its factorization.

667151413421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284335.

The product of its digits is 120960, while the sum is 41.

The spelling of 667151413421 in words is "six hundred sixty-seven billion, one hundred fifty-one million, four hundred thirteen thousand, four hundred twenty-one".