660273426 has 12 divisors (see below), whose sum is σ = 1430592462. Its totient is φ = 220091136.

The previous prime is 660273407. The next prime is 660273431. The reversal of 660273426 is 624372066.

It is a happy number.

660273426 is a `hidden beast` number, since 6 + 602 + 7 + 3 + 42 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 660233025 + 40401 = 25695^2 + 201^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18340911 + ... + 18340946.

Almost surely, 2^660273426 is an apocalyptic number.

660273426 is an abundant number, since it is smaller than the sum of its proper divisors (770319036).

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

660273426 is a wasteful number, since it uses less digits than its factorization.

660273426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36681865 (or 36681862 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 660273426 is about 25695.7861525971. The cubic root of 660273426 is about 870.7789852171.

The spelling of 660273426 in words is "six hundred sixty million, two hundred seventy-three thousand, four hundred twenty-six".