712415661 has 4 divisors (see below), whose sum is σ = 949887552. Its totient is φ = 474943772.

The previous prime is 712415611. The next prime is 712415663. The reversal of 712415661 is 166514217.

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: 166514217 = 3 ⋅55504739.

It is a cyclic number.

It is not a de Polignac number, because 712415661 - 2⁷ = 712415533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (712415663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118735941 + ... + 118735946.

It is an arithmetic number, because the mean of its divisors is an integer number (237471888).

Almost surely, 2^712415661 is an apocalyptic number.

It is an amenable number.

712415661 is a deficient number, since it is larger than the sum of its proper divisors (237471891).

712415661 is a wasteful number, since it uses less digits than its factorization.

712415661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237471890.

The product of its digits is 10080, while the sum is 33.

The square root of 712415661 is about 26691.1157691094. The cubic root of 712415661 is about 893.1227512695.

Adding to 712415661 its reverse (166514217), we get a palindrome (878929878).

It can be divided in two parts, 7124156 and 61, that added together give a palindrome (7124217).

The spelling of 712415661 in words is "seven hundred twelve million, four hundred fifteen thousand, six hundred sixty-one".