667409958 has 12 divisors (see below), whose sum is σ = 1446054948. Its totient is φ = 222469980.

The previous prime is 667409957. The next prime is 667409969. The reversal of 667409958 is 859904766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667409957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18539148 + ... + 18539183.

It is an arithmetic number, because the mean of its divisors is an integer number (120504579).

Almost surely, 2^667409958 is an apocalyptic number.

667409958 is an abundant number, since it is smaller than the sum of its proper divisors (778644990).

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

667409958 is a wasteful number, since it uses less digits than its factorization.

667409958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37078339 (or 37078336 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 667409958 is about 25834.2787396900. The cubic root of 667409958 is about 873.9050065458.

The spelling of 667409958 in words is "six hundred sixty-seven million, four hundred nine thousand, nine hundred fifty-eight".