70505663 has 8 divisors (see below), whose sum is σ = 72173088. Its totient is φ = 68857344.

The previous prime is 70505657. The next prime is 70505671. The reversal of 70505663 is 36650507.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70505663 - 2¹⁸ = 70243519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70505623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2831 + ... + 12207.

It is an arithmetic number, because the mean of its divisors is an integer number (9021636).

Almost surely, 2^70505663 is an apocalyptic number.

70505663 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

70505663 is a deficient number, since it is larger than the sum of its proper divisors (1667425).

70505663 is a wasteful number, since it uses less digits than its factorization.

70505663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 70505663 is about 8396.7650318441. The cubic root of 70505663 is about 413.1185221103.

The spelling of 70505663 in words is "seventy million, five hundred five thousand, six hundred sixty-three".