1377720506 has 8 divisors (see below), whose sum is σ = 2069776800. Its totient is φ = 687794908.

The previous prime is 1377720469. The next prime is 1377720583. The reversal of 1377720506 is 6050277731.

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

It is a super-2 number, since 2×1377720506² = 3796227585305792072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1377720506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531056 + ... + 533643.

It is an arithmetic number, because the mean of its divisors is an integer number (258722100).

Almost surely, 2^1377720506 is an apocalyptic number.

1377720506 is a deficient number, since it is larger than the sum of its proper divisors (692056294).

1377720506 is a wasteful number, since it uses less digits than its factorization.

1377720506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065348.

The product of its (nonzero) digits is 61740, while the sum is 38.

The square root of 1377720506 is about 37117.6576038952. The cubic root of 1377720506 is about 1112.7229380427.

The spelling of 1377720506 in words is "one billion, three hundred seventy-seven million, seven hundred twenty thousand, five hundred six".