667428342 has 32 divisors (see below), whose sum is σ = 1546455552. Its totient is φ = 188080704.

The previous prime is 667428337. The next prime is 667428373. The reversal of 667428342 is 243824766.

It is a super-3 number, since 3×667428342³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 667428294 and 667428303.

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, 105778 + ... + 111909.

It is an arithmetic number, because the mean of its divisors is an integer number (48326736).

Almost surely, 2^667428342 is an apocalyptic number.

667428342 is an abundant number, since it is smaller than the sum of its proper divisors (879027210).

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

667428342 is a wasteful number, since it uses less digits than its factorization.

667428342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217772.

The product of its digits is 387072, while the sum is 42.

The square root of 667428342 is about 25834.6345435735. The cubic root of 667428342 is about 873.9130304607.

The spelling of 667428342 in words is "six hundred sixty-seven million, four hundred twenty-eight thousand, three hundred forty-two".