70666650 has 36 divisors (see below), whose sum is σ = 189858942. Its totient is φ = 18844320.

The previous prime is 70666613. The next prime is 70666663. The reversal of 70666650 is 5666607.

It can be written as a sum of positive squares in 3 ways, for example, as 55666521 + 15000129 = 7461^2 + 3873^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 78069 + ... + 78968.

Almost surely, 2^70666650 is an apocalyptic number.

70666650 is an abundant number, since it is smaller than the sum of its proper divisors (119192292).

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

70666650 is a wasteful number, since it uses less digits than its factorization.

70666650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157055 (or 157047 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 70666650 is about 8406.3458172978. The cubic root of 70666650 is about 413.4327103807.

The spelling of 70666650 in words is "seventy million, six hundred sixty-six thousand, six hundred fifty".