1355400666 has 24 divisors (see below), whose sum is σ = 3037968180. Its totient is φ = 436220736.

The previous prime is 1355400653. The next prime is 1355400679. The reversal of 1355400666 is 6660045531.

It is an interprime number because it is at equal distance from previous prime (1355400653) and next prime (1355400679).

It can be written as a sum of positive squares in 2 ways, for example, as 1352106441 + 3294225 = 36771^2 + 1815^2 .

It is a super-2 number, since 2×1355400666² = 3674221930786487112, 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 1355400666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1297755 + ... + 1298798.

Almost surely, 2^1355400666 is an apocalyptic number.

1355400666 is an abundant number, since it is smaller than the sum of its proper divisors (1682567514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1355400666 is a wasteful number, since it uses less digits than its factorization.

1355400666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596590 (or 2596587 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1355400666 is about 36815.7665409808. The cubic root of 1355400666 is about 1106.6812829919.

The spelling of 1355400666 in words is "one billion, three hundred fifty-five million, four hundred thousand, six hundred sixty-six".