70863661 has 16 divisors (see below), whose sum is σ = 79289280. Its totient is φ = 62788480.

The previous prime is 70863649. The next prime is 70863671. The reversal of 70863661 is 16636807.

It is a cyclic number.

It is not a de Polignac number, because 70863661 - 2⁵ = 70863629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70863661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70863601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88515 + ... + 89311.

It is an arithmetic number, because the mean of its divisors is an integer number (4955580).

Almost surely, 2^70863661 is an apocalyptic number.

It is an amenable number.

70863661 is a deficient number, since it is larger than the sum of its proper divisors (8425619).

70863661 is a wasteful number, since it uses less digits than its factorization.

70863661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 70863661 is about 8418.0556543658. The cubic root of 70863661 is about 413.8165558331.

The spelling of 70863661 in words is "seventy million, eight hundred sixty-three thousand, six hundred sixty-one".