70661618 has 8 divisors (see below), whose sum is σ = 106668012. Its totient is φ = 35105616.

The previous prime is 70661581. The next prime is 70661621. The reversal of 70661618 is 81616607.

It can be written as a sum of positive squares in 2 ways, for example, as 66471409 + 4190209 = 8153^2 + 2047^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112205 + ... + 112832.

Almost surely, 2^70661618 is an apocalyptic number.

70661618 is a deficient number, since it is larger than the sum of its proper divisors (36006394).

70661618 is a wasteful number, since it uses less digits than its factorization.

70661618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225196.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 70661618 is about 8406.0465142658. The cubic root of 70661618 is about 413.4228969690.

The spelling of 70661618 in words is "seventy million, six hundred sixty-one thousand, six hundred eighteen".