70664659 has 4 divisors (see below), whose sum is σ = 76100416. Its totient is φ = 65228904.

The previous prime is 70664651. The next prime is 70664687. The reversal of 70664659 is 95646607.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 70664659 - 2³ = 70664651 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2717859 + ... + 2717884.

It is an arithmetic number, because the mean of its divisors is an integer number (19025104).

Almost surely, 2^70664659 is an apocalyptic number.

70664659 is a deficient number, since it is larger than the sum of its proper divisors (5435757).

70664659 is a wasteful number, since it uses less digits than its factorization.

70664659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5435756.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 70664659 is about 8406.2273940216. The cubic root of 70664659 is about 413.4288275861.

The spelling of 70664659 in words is "seventy million, six hundred sixty-four thousand, six hundred fifty-nine".