1370666655 has 24 divisors (see below), whose sum is σ = 2420653248. Its totient is φ = 717228096.

The previous prime is 1370666653. The next prime is 1370666663. The reversal of 1370666655 is 5566660731.

It is not a de Polignac number, because 1370666655 - 2¹ = 1370666653 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1370666655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1370666651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284967 + ... + 289736.

It is an arithmetic number, because the mean of its divisors is an integer number (100860552).

Almost surely, 2^1370666655 is an apocalyptic number.

1370666655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1370666655 is a deficient number, since it is larger than the sum of its proper divisors (1049986593).

1370666655 is a wasteful number, since it uses less digits than its factorization.

1370666655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574767 (or 574764 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 45.

The square root of 1370666655 is about 37022.5155142111. The cubic root of 1370666655 is about 1110.8206616726.

The spelling of 1370666655 in words is "one billion, three hundred seventy million, six hundred sixty-six thousand, six hundred fifty-five".