1220726662 has 4 divisors (see below), whose sum is σ = 1831089996. Its totient is φ = 610363330.

The previous prime is 1220726657. The next prime is 1220726671. The reversal of 1220726662 is 2666270221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2666270221 = 41 ⋅65030981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305181664 + ... + 305181667.

It is an arithmetic number, because the mean of its divisors is an integer number (457772499).

Almost surely, 2^1220726662 is an apocalyptic number.

1220726662 is a deficient number, since it is larger than the sum of its proper divisors (610363334).

1220726662 is an equidigital number, since it uses as much as digits as its factorization.

1220726662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610363333.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 1220726662 is about 34938.8989809353. The cubic root of 1220726662 is about 1068.7418355702.

Adding to 1220726662 its reverse (2666270221), we get a palindrome (3886996883).

The spelling of 1220726662 in words is "one billion, two hundred twenty million, seven hundred twenty-six thousand, six hundred sixty-two".