667709948 has 12 divisors (see below), whose sum is σ = 1169746032. Its totient is φ = 333496800.

The previous prime is 667709947. The next prime is 667709983. The reversal of 667709948 is 849907766.

It is a junction number, because it is equal to n+sod(n) for n = 667709893 and 667709902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667709947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85328 + ... + 92823.

It is an arithmetic number, because the mean of its divisors is an integer number (97478836).

Almost surely, 2^667709948 is an apocalyptic number.

It is an amenable number.

667709948 is a deficient number, since it is larger than the sum of its proper divisors (502036084).

667709948 is a wasteful number, since it uses less digits than its factorization.

667709948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179092 (or 179090 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 56.

The square root of 667709948 is about 25840.0841329900. The cubic root of 667709948 is about 874.0359223297.

The spelling of 667709948 in words is "six hundred sixty-seven million, seven hundred nine thousand, nine hundred forty-eight".