667228136 has 8 divisors (see below), whose sum is σ = 1251052770. Its totient is φ = 333614064.

The previous prime is 667228123. The next prime is 667228151. The reversal of 667228136 is 631822766.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 644855236 + 22372900 = 25394^2 + 4730^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 667228093 and 667228102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41701751 + ... + 41701766.

Almost surely, 2^667228136 is an apocalyptic number.

It is an amenable number.

667228136 is a deficient number, since it is larger than the sum of its proper divisors (583824634).

667228136 is a wasteful number, since it uses less digits than its factorization.

667228136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83403523 (or 83403519 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 667228136 is about 25830.7594932863. The cubic root of 667228136 is about 873.8256402405.

The spelling of 667228136 in words is "six hundred sixty-seven million, two hundred twenty-eight thousand, one hundred thirty-six".