1227670661 has 8 divisors (see below), whose sum is σ = 1404346944. Its totient is φ = 1051318080.

The previous prime is 1227670651. The next prime is 1227670663. The reversal of 1227670661 is 1660767221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1227670661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227670663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72740 + ... + 88013.

It is an arithmetic number, because the mean of its divisors is an integer number (175543368).

Almost surely, 2^1227670661 is an apocalyptic number.

It is an amenable number.

1227670661 is a deficient number, since it is larger than the sum of its proper divisors (176676283).

1227670661 is a wasteful number, since it uses less digits than its factorization.

1227670661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161851.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 1227670661 is about 35038.1315283792. The cubic root of 1227670661 is about 1070.7644872909.

The spelling of 1227670661 in words is "one billion, two hundred twenty-seven million, six hundred seventy thousand, six hundred sixty-one".