70077561 has 4 divisors (see below), whose sum is σ = 93436752. Its totient is φ = 46718372.

The previous prime is 70077559. The next prime is 70077563. The reversal of 70077561 is 16577007.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16577007 = 3 ⋅5525669.

It is an interprime number because it is at equal distance from previous prime (70077559) and next prime (70077563).

It is a cyclic number.

It is not a de Polignac number, because 70077561 - 2¹ = 70077559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70077563) 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 3 ways as a sum of consecutive naturals, for example, 11679591 + ... + 11679596.

It is an arithmetic number, because the mean of its divisors is an integer number (23359188).

Almost surely, 2^70077561 is an apocalyptic number.

It is an amenable number.

70077561 is a deficient number, since it is larger than the sum of its proper divisors (23359191).

70077561 is a wasteful number, since it uses less digits than its factorization.

70077561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23359190.

The product of its (nonzero) digits is 10290, while the sum is 33.

The square root of 70077561 is about 8371.2341384052. The cubic root of 70077561 is about 412.2806885630.

The spelling of 70077561 in words is "seventy million, seventy-seven thousand, five hundred sixty-one".