70665825 has 24 divisors (see below), whose sum is σ = 118443808. Its totient is φ = 37169280.

The previous prime is 70665809. The next prime is 70665841. The reversal of 70665825 is 52856607.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (70665809) and next prime (70665841).

It is not a de Polignac number, because 70665825 - 2⁴ = 70665809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 979 + ... + 11928.

Almost surely, 2^70665825 is an apocalyptic number.

70665825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

70665825 is a deficient number, since it is larger than the sum of its proper divisors (47777983).

70665825 is a wasteful number, since it uses less digits than its factorization.

70665825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12993 (or 12988 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 70665825 is about 8406.2967470819. The cubic root of 70665825 is about 413.4311014967.

The spelling of 70665825 in words is "seventy million, six hundred sixty-five thousand, eight hundred twenty-five".