667542276 has 96 divisors (see below), whose sum is σ = 1851964800. Its totient is φ = 207308160.

The previous prime is 667542241. The next prime is 667542287. The reversal of 667542276 is 672245766.

It is a super-2 number, since 2×667542276² = 891225380494520352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122506 + ... + 127838.

It is an arithmetic number, because the mean of its divisors is an integer number (19291300).

Almost surely, 2^667542276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667542276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (925982400).

667542276 is an abundant number, since it is smaller than the sum of its proper divisors (1184422524).

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

667542276 is a wasteful number, since it uses less digits than its factorization.

667542276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5426 (or 5418 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 667542276 is about 25836.8395126029. The cubic root of 667542276 is about 873.9627550208.

The spelling of 667542276 in words is "six hundred sixty-seven million, five hundred forty-two thousand, two hundred seventy-six".