667172650 has 96 divisors (see below), whose sum is σ = 1399464000. Its totient is φ = 235146240.

The previous prime is 667172647. The next prime is 667172657. The reversal of 667172650 is 56271766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (667172657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1760161 + ... + 1760539.

It is an arithmetic number, because the mean of its divisors is an integer number (14577750).

Almost surely, 2^667172650 is an apocalyptic number.

667172650 is an abundant number, since it is smaller than the sum of its proper divisors (732291350).

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

667172650 is a wasteful number, since it uses less digits than its factorization.

667172650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 667172650 is about 25829.6854413677. The cubic root of 667172650 is about 873.8014174243.

The spelling of 667172650 in words is "six hundred sixty-seven million, one hundred seventy-two thousand, six hundred fifty".