667452940 has 216 divisors, whose sum is σ = 1863757728. Its totient is φ = 196416000.

The previous prime is 667452931. The next prime is 667452959. The reversal of 667452940 is 49254766.

It is a happy number.

It is a super-2 number, since 2×667452940² = 890986854229287200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 16279320 + ... + 16279360.

It is an arithmetic number, because the mean of its divisors is an integer number (8628508).

Almost surely, 2^667452940 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 667452940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (931878864).

667452940 is an abundant number, since it is smaller than the sum of its proper divisors (1196304788).

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

667452940 is a wasteful number, since it uses less digits than its factorization.

667452940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 667452940 is about 25835.1106055306. The cubic root of 667452940 is about 873.9237663192.

The spelling of 667452940 in words is "six hundred sixty-seven million, four hundred fifty-two thousand, nine hundred forty".