61670407 has 4 divisors (see below), whose sum is σ = 65298096. Its totient is φ = 58042720.

The previous prime is 61670393. The next prime is 61670417. The reversal of 61670407 is 70407616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61670407 - 2¹⁹ = 61146119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61670417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1813819 + ... + 1813852.

It is an arithmetic number, because the mean of its divisors is an integer number (16324524).

Almost surely, 2^61670407 is an apocalyptic number.

61670407 is a deficient number, since it is larger than the sum of its proper divisors (3627689).

61670407 is a wasteful number, since it uses less digits than its factorization.

61670407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627688.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 61670407 is about 7853.0508084438. The cubic root of 61670407 is about 395.0865739843.

The spelling of 61670407 in words is "sixty-one million, six hundred seventy thousand, four hundred seven".