61626691 has 8 divisors (see below), whose sum is σ = 70519904. Its totient is φ = 52755840.

The previous prime is 61626647. The next prime is 61626713. The reversal of 61626691 is 19662616.

61626691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 61626691 - 2⁷ = 61626563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61626691.

It is not an unprimeable number, because it can be changed into a prime (61626601) 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 7 ways as a sum of consecutive naturals, for example, 811 + ... + 11131.

It is an arithmetic number, because the mean of its divisors is an integer number (8814988).

Almost surely, 2^61626691 is an apocalyptic number.

61626691 is a deficient number, since it is larger than the sum of its proper divisors (8893213).

61626691 is a wasteful number, since it uses less digits than its factorization.

61626691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11181.

The product of its digits is 23328, while the sum is 37.

The square root of 61626691 is about 7850.2669381366. The cubic root of 61626691 is about 394.9931975542.

The spelling of 61626691 in words is "sixty-one million, six hundred twenty-six thousand, six hundred ninety-one".