70475561 has 4 divisors (see below), whose sum is σ = 75896772. Its totient is φ = 65054352.

The previous prime is 70475551. The next prime is 70475563. The reversal of 70475561 is 16557407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16557407 = 1319 ⋅12553.

It can be written as a sum of positive squares in 2 ways, for example, as 4541161 + 65934400 = 2131^2 + 8120^2 .

It is a cyclic number.

It is not a de Polignac number, because 70475561 - 2⁶ = 70475497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70475563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2710586 + ... + 2710611.

It is an arithmetic number, because the mean of its divisors is an integer number (18974193).

Almost surely, 2^70475561 is an apocalyptic number.

It is an amenable number.

70475561 is a deficient number, since it is larger than the sum of its proper divisors (5421211).

70475561 is a wasteful number, since it uses less digits than its factorization.

70475561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5421210.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 70475561 is about 8394.9723644572. The cubic root of 70475561 is about 413.0597208574.

The spelling of 70475561 in words is "seventy million, four hundred seventy-five thousand, five hundred sixty-one".