70640625 has 56 divisors (see below), whose sum is σ = 129373344. Its totient is φ = 34000000.

The previous prime is 70640621. The next prime is 70640629. The reversal of 70640625 is 52604607.

It is an interprime number because it is at equal distance from previous prime (70640621) and next prime (70640629).

It is not a de Polignac number, because 70640625 - 2² = 70640621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70640592 and 70640601.

It is not an unprimeable number, because it can be changed into a prime (70640621) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 515557 + ... + 515693.

Almost surely, 2^70640625 is an apocalyptic number.

70640625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

70640625 is a deficient number, since it is larger than the sum of its proper divisors (58732719).

70640625 is an equidigital number, since it uses as much as digits as its factorization.

70640625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 70640625 is about 8404.7977370071. The cubic root of 70640625 is about 413.3819513715.

The spelling of 70640625 in words is "seventy million, six hundred forty thousand, six hundred twenty-five".