70664657 has 16 divisors (see below), whose sum is σ = 83244672. Its totient is φ = 58734720.

The previous prime is 70664651. The next prime is 70664687. The reversal of 70664657 is 75646607.

It is a cyclic number.

It is not a de Polignac number, because 70664657 - 2¹² = 70660561 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (70664651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30038 + ... + 32304.

It is an arithmetic number, because the mean of its divisors is an integer number (5202792).

Almost surely, 2^70664657 is an apocalyptic number.

It is an amenable number.

70664657 is a deficient number, since it is larger than the sum of its proper divisors (12580015).

70664657 is a wasteful number, since it uses less digits than its factorization.

70664657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 70664657 is about 8406.2272750622. The cubic root of 70664657 is about 413.4288236857.

The spelling of 70664657 in words is "seventy million, six hundred sixty-four thousand, six hundred fifty-seven".