1366901990 has 16 divisors (see below), whose sum is σ = 2589919920. Its totient is φ = 517983840.

The previous prime is 1366901957. The next prime is 1366902001. The reversal of 1366901990 is 991096631.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3596921 + ... + 3597300.

It is an arithmetic number, because the mean of its divisors is an integer number (161869995).

Almost surely, 2^1366901990 is an apocalyptic number.

1366901990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1366901990 is a deficient number, since it is larger than the sum of its proper divisors (1223017930).

1366901990 is a wasteful number, since it uses less digits than its factorization.

1366901990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7194247.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 1366901990 is about 36971.6376429284. The cubic root of 1366901990 is about 1109.8027379893.

The spelling of 1366901990 in words is "one billion, three hundred sixty-six million, nine hundred one thousand, nine hundred ninety".