70650644 has 6 divisors (see below), whose sum is σ = 123638634. Its totient is φ = 35325320.

The previous prime is 70650577. The next prime is 70650647. The reversal of 70650644 is 44605607.

It can be written as a sum of positive squares in only one way, i.e., 68724100 + 1926544 = 8290^2 + 1388^2 .

It is a super-2 number, since 2×70650644² = 9983026995229472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70650644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70650647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8831327 + ... + 8831334.

It is an arithmetic number, because the mean of its divisors is an integer number (20606439).

Almost surely, 2^70650644 is an apocalyptic number.

It is an amenable number.

70650644 is a deficient number, since it is larger than the sum of its proper divisors (52987990).

70650644 is a wasteful number, since it uses less digits than its factorization.

70650644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17662665 (or 17662663 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 70650644 is about 8405.3937444953. The cubic root of 70650644 is about 413.4014938467.

The spelling of 70650644 in words is "seventy million, six hundred fifty thousand, six hundred forty-four".