61771067 has 4 divisors (see below), whose sum is σ = 62617320. Its totient is φ = 60924816.

The previous prime is 61771049. The next prime is 61771097. The reversal of 61771067 is 76017716.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61771067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61771027) 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, 423017 + ... + 423162.

It is an arithmetic number, because the mean of its divisors is an integer number (15654330).

Almost surely, 2^61771067 is an apocalyptic number.

61771067 is a deficient number, since it is larger than the sum of its proper divisors (846253).

61771067 is an equidigital number, since it uses as much as digits as its factorization.

61771067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846252.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 61771067 is about 7859.4571695506. The cubic root of 61771067 is about 395.3014139079.

The spelling of 61771067 in words is "sixty-one million, seven hundred seventy-one thousand, sixty-seven".