70664577 has 4 divisors (see below), whose sum is σ = 94219440. Its totient is φ = 47109716.

The previous prime is 70664557. The next prime is 70664617. The reversal of 70664577 is 77546607.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77546607 = 3 ⋅25848869.

It is a cyclic number.

It is not a de Polignac number, because 70664577 - 2¹⁸ = 70402433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70664557) 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, 11777427 + ... + 11777432.

It is an arithmetic number, because the mean of its divisors is an integer number (23554860).

Almost surely, 2^70664577 is an apocalyptic number.

It is an amenable number.

70664577 is a deficient number, since it is larger than the sum of its proper divisors (23554863).

70664577 is a wasteful number, since it uses less digits than its factorization.

70664577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23554862.

The product of its (nonzero) digits is 246960, while the sum is 42.

The square root of 70664577 is about 8406.2225166837. Note that the first 3 decimals coincide. The cubic root of 70664577 is about 413.4286676703.

The spelling of 70664577 in words is "seventy million, six hundred sixty-four thousand, five hundred seventy-seven".