70661247 has 8 divisors (see below), whose sum is σ = 99173760. Its totient is φ = 44628120.

The previous prime is 70661233. The next prime is 70661249. The reversal of 70661247 is 74216607.

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

It is not a de Polignac number, because 70661247 - 2¹⁵ = 70628479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70661249) 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, 619779 + ... + 619892.

It is an arithmetic number, because the mean of its divisors is an integer number (12396720).

Almost surely, 2^70661247 is an apocalyptic number.

70661247 is a deficient number, since it is larger than the sum of its proper divisors (28512513).

70661247 is a wasteful number, since it uses less digits than its factorization.

70661247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239693.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 70661247 is about 8406.0244467881. The cubic root of 70661247 is about 413.4221734260.

The spelling of 70661247 in words is "seventy million, six hundred sixty-one thousand, two hundred forty-seven".