70644655 has 16 divisors (see below), whose sum is σ = 88274304. Its totient is φ = 54224640.

The previous prime is 70644647. The next prime is 70644659. The reversal of 70644655 is 55644607.

It is a happy number.

It is not a de Polignac number, because 70644655 - 2³ = 70644647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70644659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10890 + ... + 16120.

It is an arithmetic number, because the mean of its divisors is an integer number (5517144).

Almost surely, 2^70644655 is an apocalyptic number.

70644655 is a deficient number, since it is larger than the sum of its proper divisors (17629649).

70644655 is a wasteful number, since it uses less digits than its factorization.

70644655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5346.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 70644655 is about 8405.0374776083. The cubic root of 70644655 is about 413.3898122759.

The spelling of 70644655 in words is "seventy million, six hundred forty-four thousand, six hundred fifty-five".